7Baggers

ONEOK, Inc
(NYSE:OKE) 

OKE stock logo

ONEOK, Inc., together with its subsidiaries, engages in gathering, processing, storage, and transportation of natural gas in the United States. It operates through Natural Gas Gathering and Processing, Natural Gas Liquids, and Natural Gas Pipelines segments. The company owns natural gas gathering pi...

Founded: 1906
Full Time Employees: 2,882
Sector: Energy
Industry: Oil & Gas Midstream

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Quarterly
Annual
    Unit: USD2025-12-31 2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-05-04 2011-03-31 2011-02-22 2010-09-30 2010-06-30 2010-05-26 2010-03-31 2010-03-12 2009-12-31 2009-11-05 2009-09-30 2009-07-23 2009-06-30 2009-04-30 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 
                                                                                     
      revenues
                                                    4,140,111,000 3,571,925,000 3,349,236,000 3,541,445,000 3,659,924,000 3,028,775,000 2,529,260,000 3,414,600,000 3,829,239,000 3,595,191,000 3,514,476,000 3,866,888,000 3,866,888,000 3,356,249,000 2,942,703,000 2,807,131,000 2,807,131,000 3,923,967,000 3,923,967,000 3,729,461,000 2,364,736,000 2,364,736,000 2,227,627,000 2,227,627,000 2,789,827,000 2,843,245,000 4,239,246,000 4,172,866,000      
      commodity sales
    7,824,000,000 7,416,000,000 6,726,000,000 6,912,000,000 5,775,000,000 4,083,000,000 3,994,000,000 3,928,000,000 4,327,000,000 3,760,000,000 3,371,000,000 4,156,000,000 4,655,913,000 5,563,535,000 5,650,803,000 5,105,211,000 5,064,590,000 4,204,792,000 3,074,773,000 2,836,109,000 2,250,884,000 1,852,198,000 1,343,557,000 1,808,620,000 2,348,413,000 1,947,834,000 2,146,841,000 2,472,959,000 2,816,751,000 3,083,625,000 2,675,262,000 2,820,004,000 3,162,392,000 2,322,534,000 2,161,009,000 2,216,717,000 2,101,150,000 1,840,523,000 1,633,272,000 1,283,511,000 1,456,023,000 1,484,350,000 1,722,254,000 1,435,716,000 2,448,648,000 2,754,495,000 2,715,109,000 2,806,729,000                                  
      services and other
    1,241,000,000 1,218,000,000 1,161,000,000 1,131,000,000                                                                              
      total revenues
    9,065,000,000 8,634,000,000 7,887,000,000 8,043,000,000 7,000,000,000 5,023,000,000 4,894,000,000 4,781,000,000 5,235,000,000 4,189,000,000 3,732,000,000 4,521,000,000 5,032,031,000 5,913,531,000 5,996,721,000 5,444,609,000 5,420,491,000 4,536,175,000 3,388,964,000 3,194,679,000 2,570,577,000 2,174,264,000 1,660,729,000 2,136,672,000 2,663,606,000 2,263,228,000 2,457,575,000 2,779,958,000 3,136,700,000 3,393,890,000 2,960,529,000 3,102,077,000 3,792,158,000 2,906,366,000 2,725,772,000 2,749,611,000 2,654,461,000 2,357,907,000 2,134,107,000 1,774,459,000 1,930,902,000 1,898,946,000 2,128,052,000 1,805,306,000 2,844,768,000 3,120,145,000 3,066,882,000 3,163,296,000                             4,902,076,000 3,984,968,000 2,809,997,000 2,871,304,000 3,799,006,000 
      yoy
    29.50% 71.89% 61.16% 68.23% 33.72% 19.91% 31.14% 5.75% 4.03% -29.16% -37.77% -16.96% -7.17% 30.36% 76.95% 70.43% 110.87% 108.63% 104.06% 49.52% -3.49% -3.93% -32.42% -23.14% -15.08% -33.31% -16.99% -10.38% -17.28% 16.77% 8.61% 12.82% 42.86% 23.26% 27.72% 54.95% 37.47% 24.17% 0.28% -1.71% -32.12% -39.14% -30.61% -42.93%                                 29.04%     
      qoq
    4.99% 9.47% -1.94% 14.90% 39.36% 2.64% 2.36% -8.67% 24.97% 12.25% -17.45% -10.16% -14.91% -1.39% 10.14% 0.44% 19.49% 33.85% 6.08% 24.28% 18.23% 30.92% -22.27% -19.78% 17.69% -7.91% -11.60% -11.37% -7.58% 14.64% -4.56% -18.20% 30.48% 6.63% -0.87% 3.58% 12.58% 10.49% 20.27% -8.10% 1.68% -10.77% 17.88% -36.54% -8.83% 1.74% -3.05%                              23.01% 41.81% -2.14% -24.42%  
      cost of sales and fuel
    6,396,000,000 5,962,000,000 5,360,000,000 5,655,000,000 4,496,000,000 3,027,000,000 2,891,000,000 2,897,000,000 3,301,000,000 2,799,000,000 2,482,000,000 3,347,000,000 3,893,245,000 4,772,674,000 4,877,999,000 4,365,948,000 4,319,039,000 3,449,127,000 2,366,979,000 2,121,510,000 1,627,086,000 1,265,674,000 940,458,000 1,276,928,000 1,791,341,000 1,414,528,000 1,625,794,000 1,956,377,000 2,318,099,000 2,560,765,000 2,175,818,000 2,368,026,000 3,073,764,000 2,229,416,000 2,091,022,000 2,143,843,000 2,021,470,000 1,751,593,000 1,527,323,000 1,195,738,000 1,333,286,000 1,360,809,000 1,603,093,000 1,343,864,000 2,281,273,000 2,583,204,000 2,571,402,000 2,652,669,000 3,488,457,000 3,010,737,000 2,895,847,000 2,917,993,000 3,055,604,000 2,474,803,000 1,980,298,000 2,771,013,000 3,138,070,000 3,061,198,000 2,992,828,000 3,233,339,000 3,233,339,000 2,812,474,000 2,491,333,000 2,349,054,000 2,349,054,000 3,304,648,000 3,304,648,000 3,149,206,000 1,912,882,000 1,912,882,000 1,795,201,000 1,795,201,000 2,238,416,000 2,369,484,000 3,784,220,000 3,752,038,000 4,316,164,000 3,447,569,000 2,469,837,000 2,504,795,000 3,234,379,000 
      operations and maintenance
    673,000,000 639,000,000 618,000,000 655,000,000 681,000,000 512,000,000 490,000,000 486,000,000 486,000,000 308,000,000 296,000,000 239,000,000 274,739,000 238,414,000 230,687,000 214,406,000 255,579,000 225,364,000 212,319,000 207,158,000 222,394,000 173,548,000 190,138,000 175,096,000 231,376,000 218,305,000 206,776,000 207,251,000 213,681,000 206,247,000 202,037,000 181,181,000 194,511,000 182,409,000 193,501,000 164,769,000 179,859,000 165,664,000 167,667,000 155,145,000 163,569,000 146,979,000 140,869,000 154,331,000 165,686,000 153,408,000 153,323,000 126,726,000 236,210,000 209,019,000 203,293,000 223,603,000 203,032,000 206,048,000 204,126,000 192,881,000 232,328,000 186,935,000 199,797,000 194,606,000 194,606,000 205,969,000 183,893,000 178,478,000 178,478,000 180,272,000 180,272,000 209,854,000 179,678,000 179,678,000 184,874,000 184,874,000 161,719,000 175,334,000 179,840,000 171,431,000 167,992,000 198,564,000 160,352,000 156,826,000 158,420,000 
      depreciation and amortization
    388,000,000 378,000,000 368,000,000 380,000,000 344,000,000 274,000,000 262,000,000 254,000,000 260,000,000 177,000,000 170,000,000 162,000,000 157,415,000 157,102,000 157,757,000 153,858,000 153,118,000 154,542,000 156,921,000 157,120,000 152,648,000 153,245,000 140,416,000 132,353,000 125,983,000 121,430,000 114,964,000 114,158,000 110,649,000 107,383,000 106,288,000 104,237,000 103,769,000 102,298,000 100,849,000 99,419,000 99,310,000 98,550,000 99,247,000 94,478,000 93,379,000 88,299,000 86,987,000 85,955,000 80,555,000 74,588,000 72,127,000 67,414,000 108,034,000 94,267,000 91,855,000 90,221,000 86,415,000 81,434,000 84,586,000 83,409,000 77,959,000 75,986,000 78,824,000 79,391,000 79,391,000 76,717,000 77,234,000 75,510,000 75,510,000 77,856,000 77,856,000 73,298,000 72,318,000 72,318,000 71,249,000 71,249,000 72,126,000 64,498,000 60,249,000 59,701,000 59,479,000 59,506,000 56,364,000   
      general taxes
    94,000,000 99,000,000 88,000,000 97,000,000 95,000,000 70,000,000 83,000,000 86,000,000 68,000,000 44,000,000 47,000,000 57,000,000 47,400,000 47,770,000 46,777,000 49,511,000 40,536,000 39,753,000 41,940,000 44,439,000 27,377,000 31,381,000 34,326,000 31,944,000 27,899,000 26,830,000 30,937,000 33,490,000 22,659,000 24,124,000 28,116,000 29,023,000 22,298,000 24,641,000 24,304,000 27,153,000 24,320,000 18,487,000 24,172,000 21,870,000 21,217,000 17,198,000 24,481,000 24,687,000 15,573,000 19,087,000 18,699,000 22,385,000 24,328,000 27,843,000 30,337,000 35,820,000 21,420,000 23,157,000 27,137,000 31,177,000 17,631,000 22,122,000 25,898,000 29,006,000 29,006,000 23,572,000 19,465,000 25,103,000 25,103,000 23,073,000 23,073,000 25,608,000 24,900,000 24,900,000 25,261,000 25,261,000 25,227,000 16,236,000 24,068,000 16,680,000 25,331,000 23,618,000 20,733,000 17,925,000 23,659,000 
      transaction costs
    7,000,000 10,000,000 22,000,000 42,000,000 56,000,000 10,000,000   25,000,000 123,000,000                                                                        
      other operating expense
    -4,500,000 -12,000,000   -16,250,000 2,000,000   -195,500,000 -1,000,000  -781,000,000 -97,580,000 -1,630,000 -5,449,000                                                                   
      operating income
    1,532,000,000 1,558,000,000 1,431,000,000 1,220,000,000 1,568,000,000 1,128,000,000 1,229,000,000 1,064,000,000 1,099,000,000 739,000,000 737,000,000 1,497,000,000 756,812,000 699,201,000 688,950,000 662,456,000 652,167,000 667,859,000 611,512,000 664,721,000 538,663,000 550,433,000 355,730,000 -83,469,000 487,314,000 482,151,000 476,146,000 468,742,000 471,865,000 495,534,000 448,366,000 419,699,000 397,836,000 351,906,000 316,733,000 314,420,000 329,600,000 329,357,000 315,285,000 311,434,000 242,017,000 284,935,000 272,744,000 196,463,000 306,747,000 291,392,000 251,315,000 294,117,000 294,621,000 230,081,000 128,183,000 273,849,000 299,586,000 242,913,000 234,079,000 325,922,000 363,079,000 248,881,000 216,917,000 330,036,000 330,036,000 241,068,000 186,904,000 178,713,000 178,713,000 337,332,000 337,332,000 273,055,000 173,778,000 173,778,000 154,804,000 154,804,000 293,003,000 218,690,000 192,179,000 173,012,000 333,123,000 255,727,000 102,770,000 135,745,000 328,301,000 
      yoy
    -2.30% 38.12% 16.44% 14.66% 42.68% 52.64% 66.76% -28.92% 45.21% 5.69% 6.97% 125.98% 16.05% 4.69% 12.66% -0.34% 21.07% 21.33% 71.90% -896.37% 10.54% 14.16% -25.29% -117.81% 3.27% -2.70% 6.20% 11.69% 18.61% 40.81% 41.56% 33.48% 20.70% 6.85% 0.46% 0.96% 36.19% 15.59% 15.60% 58.52% -21.10% -2.22% 8.53% -33.20% 4.12% 26.65% 96.06% 7.40% -1.66% -5.28% -45.24% -15.98% -17.49% -2.40% 7.91% -1.25% 10.01% 3.24% 16.06% 84.67% 84.67% -28.54% -44.59% -34.55% 2.84% 94.12% 117.91% 76.39% -40.69% -20.54% -19.45% -10.52% -12.04% -14.48% 87.00% 27.45% 1.47%     
      qoq
    -1.67% 8.87% 17.30% -22.19% 39.01% -8.22% 15.51% -3.18% 48.71% 0.27% -50.77% 97.80% 8.24% 1.49% 4.00% 1.58% -2.35% 9.21% -8.00% 23.40% -2.14% 54.73% -526.18% -117.13% 1.07% 1.26% 1.58% -0.66% -4.78% 10.52% 6.83% 5.50% 13.05% 11.10% 0.74% -4.61% 0.07% 4.46% 1.24% 28.68% -15.06% 4.47% 38.83% -35.95% 5.27% 15.95% -14.55% -0.17% 28.05% 79.49% -53.19% -8.59% 23.33% 3.77% -28.18% -10.23% 45.88% 14.74% -34.27% 0.00% 36.91% 28.98% 4.58% 0.00% -47.02% 0.00% 23.54% 57.13% 0.00% 12.26% 0.00% -47.17% 33.98% 13.79% 11.08% -48.06% 30.27% 148.83% -24.29% -58.65%  
      operating margin %
    16.90% 18.04% 18.14% 15.17% 22.40% 22.46% 25.11% 22.25% 20.99% 17.64% 19.75% 33.11% 15.04% 11.82% 11.49% 12.17% 12.03% 14.72% 18.04% 20.81% 20.95% 25.32% 21.42% -3.91% 18.30% 21.30% 19.37% 16.86% 15.04% 14.60% 15.14% 13.53% 10.49% 12.11% 11.62% 11.44% 12.42% 13.97% 14.77% 17.55% 12.53% 15.00% 12.82% 10.88% 10.78% 9.34% 8.19% 9.30% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 6.80% 6.42% 3.66% 4.73% 8.64% 
      equity in net earnings from investments
    105,000,000 92,000,000 81,000,000 108,000,000 183,000,000 92,000,000 88,000,000 76,000,000 70,000,000 49,000,000 43,000,000 40,000,000 36,570,000 39,180,000 35,630,000 36,340,000 34,907,000 28,573,000 25,720,000 33,320,000 35,240,000 38,046,000 25,328,000 44,627,000 39,366,000 37,576,000 34,118,000 43,481,000 42,313,000 39,313,000 36,570,000 40,187,000 40,293,000 40,058,000 39,363,000 39,564,000 39,249,000 35,155,000 32,372,000 32,914,000 32,095,000 32,244,000 30,040,000 30,921,000                                      
      other income
    68,000,000 37,000,000 39,000,000 2,000,000 25,000,000 17,000,000 4,000,000 7,000,000 46,000,000 22,000,000 13,000,000 8,000,000 -957,000 -8,296,000 -9,324,000 -13,522,000 -17,215,000 6,662,000 7,005,000 215,000 9,355,000 8,175,000 17,693,000 8,522,000 5,373,000 6,643,000 5,682,000 9,360,000 -6,993,000 5,072,000 1,857,000 738,000 3,715,000 3,296,000 4,033,000 4,341,000 -3,260,000 4,242,000 4,804,000 305,000 119,000 71,000 60,000 3,136,000 2,481,000 100,000 3,213,000 1,409,000 7,831,000 6,154,000 3,134,000 7,364,000 1,009,000 5,049,000 686,000 9,861,000 383,000 124,000 341,000 3,369,000 3,369,000 6,624,000 6,710,000 711,000 711,000 2,909,000 2,909,000 4,055,000 8,950,000 8,950,000 7,939,000 7,939,000 1,665,000 179,000 12,723,000 704,000 3,232,000 -2,198,000 5,447,000 12,342,000 6,341,000 
      interest expense
    -453,000,000 -450,000,000 -438,000,000 -442,000,000 -448,000,000 -325,000,000 -298,000,000 -300,000,000 -305,000,000 -215,000,000 -180,000,000 -166,000,000 -166,202,000 -166,939,000 -170,751,000 -172,054,000 -178,395,000 -184,049,000 -184,957,000 -185,523,000 -176,931,000 -176,371,000 -218,968,000 -140,616,000 -129,283,000 -129,577,000 -117,493,000 -115,420,000 -118,489,000 -121,910,000 -113,496,000 -115,725,000 -124,190,000 -126,533,000 -118,473,000 -116,462,000 -114,188,000 -118,240,000 -118,976,000 -118,247,000 -110,730,000 -106,923,000 -102,384,000 -96,750,000 -86,459,000 -86,052,000 -88,751,000 -94,901,000 -90,130,000 -81,908,000 -81,731,000 -80,437,000 -83,591,000 -71,364,000 -71,535,000 -75,815,000 -68,318,000 -73,841,000 -75,498,000 -79,349,000 -79,349,000 -69,451,000 -70,907,000 -75,361,000 -75,361,000 -76,520,000 -76,520,000 -76,780,000 -72,689,000 -72,689,000 -73,392,000 -73,392,000 -77,961,000 -81,067,000 -61,180,000 -59,059,000  68,822,000 62,675,000 62,816,000 62,012,000 
      income before income taxes
    1,252,000,000 1,237,000,000 1,113,000,000 888,000,000 1,328,000,000 912,000,000 1,023,000,000 847,000,000 910,000,000 595,000,000 613,000,000 1,379,000,000 627,075,000 563,880,000 545,099,000 513,591,000 509,771,000 513,917,000 452,208,000 508,308,000 403,236,000 418,871,000 177,461,000 -197,252,000 418,431,000 406,520,000 410,898,000 415,142,000 389,506,000 416,899,000 369,710,000 341,820,000 316,181,000 263,659,000 219,835,000 241,126,000 249,631,000 249,804,000 232,544,000 225,977,000 -13,627,000 202,996,000 199,242,000 133,265,000 256,769,000 152,310,000 191,073,000 219,721,000 239,217,000 187,147,000 80,857,000 233,122,000 254,235,000 207,572,000 189,350,000 293,289,000 333,670,000 194,634,000 170,931,000 284,327,000 284,327,000 203,445,000 150,266,000 117,422,000 117,422,000 284,031,000 284,031,000 207,541,000 136,388,000 136,388,000 111,608,000 111,608,000 242,988,000         
      income taxes
    -274,000,000 -297,000,000 -260,000,000 -197,000,000 -328,000,000 -219,000,000 -243,000,000 -208,000,000 -222,000,000 -141,000,000 -145,000,000 -330,000,000 -142,154,000 -132,129,000 -130,721,000 -122,420,000 -130,398,000 -121,899,000   -95,207,000 -106,555,000   -98,180,000 -97,365,000 -98,935,000 -77,934,000 -96,618,000 -102,983,000 -87,531,000 -75,771,000 -251,369,000 -97,128,000 -43,844,000 -54,941,000 -54,870,000 -55,012,000 -52,458,000 -50,066,000 -12,652,000 -38,298,000 -48,222,000 -37,428,000 -56,003,000 -37,858,000 -42,313,000 -14,984,000 -55,154,000 -39,449,000 -1,362,000 -67,417,000 -58,360,000 -42,584,000 -40,412,000 -73,839,000 -71,148,000 -33,754,000 -36,165,000 -84,981,000 -84,981,000 -55,510,000 -29,965,000 -31,048,000 -31,048,000 -97,311,000 -97,311,000 -63,544,000 -34,080,000 -34,080,000 -30,258,000 -30,258,000 -79,439,000 -47,098,000 -24,031,000 -30,574,000  55,402,000 8,138,000 23,210,000 97,847,000 
      net income
    978,000,000 940,000,000 853,000,000 691,000,000 1,000,000,000 693,000,000 780,000,000 639,000,000 688,000,000 454,000,000 468,000,000 1,049,000,000 484,921,000 431,751,000 414,378,000 391,171,000 379,373,000 392,018,000 342,139,000 386,176,000 308,029,000 312,316,000 134,321,000 -141,857,000 320,251,000 309,155,000 311,963,000 337,208,000 292,888,000 313,916,000 282,179,000 266,049,000 64,812,000 166,531,000 175,991,000 186,185,000 194,465,000 194,216,000 179,859,000 174,959,000 -28,216,000 160,838,000 150,880,000 95,693,000 201,565,000 114,281,000 140,751,000 206,511,000 184,063,000 147,698,000 79,495,000 165,705,000 195,875,000 164,988,000 149,205,000 233,462,000 264,752,000 160,880,000 134,766,000 199,346,000 199,346,000 147,935,000 120,301,000 86,374,000 86,374,000 186,720,000 186,720,000 143,997,000 102,308,000 102,308,000 81,350,000 81,350,000 163,549,000 68,174,000 58,033,000 41,865,000 143,837,000 102,924,000 13,914,000 35,203,000 152,880,000 
      yoy
    -2.20% 35.64% 9.36% 8.14% 45.35% 52.64% 66.67% -39.08% 41.88% 5.15% 12.94% 168.17% 27.82% 10.14% 21.11% 1.29% 23.16% 25.52% 154.72% -372.23% -3.82% 1.02% -56.94% -142.07% 9.34% -1.52% 10.56% 26.75% 351.90% 88.50% 60.34% 42.89% -66.67% -14.25% -2.15% 6.42% -789.20% 20.75% 19.21% 82.83% -114.00% 40.74% 7.20% -53.66% 9.51% -22.63% 77.06% 24.63% -6.03% -10.48% -46.72% -29.02% -26.02% 2.55% 10.71% 17.11% 32.81% 8.75% 12.02% 130.79% 130.79% -20.77% -35.57% -40.02% -15.57% 82.51% 129.53% 77.01% -37.45% 50.07% 40.18% 94.32% 13.70% -33.76% 317.08% 18.92% -5.92%     
      qoq
    4.04% 10.20% 23.44% -30.90% 44.30% -11.15% 22.07% -7.12% 51.54% -2.99% -55.39% 116.32% 12.31% 4.19% 5.93% 3.11% -3.23% 14.58% -11.40% 25.37% -1.37% 132.51% -194.69% -144.30% 3.59% -0.90% -7.49% 15.13% -6.70% 11.25% 6.06% 310.49% -61.08% -5.38% -5.48% -4.26% 0.13% 7.98% 2.80% -720.07% -117.54% 6.60% 57.67% -52.52% 76.38% -18.81% -31.84% 12.20% 24.62% 85.80% -52.03% -15.40% 18.72% 10.58% -36.09% -11.82% 64.56% 19.38% -32.40% 0.00% 34.75% 22.97% 39.28% 0.00% -53.74% 0.00% 29.67% 40.75% 0.00% 25.76% 0.00% -50.26% 139.90% 17.47% 38.62% -70.89% 39.75% 639.72% -60.47% -76.97%  
      net income margin %
    10.79% 10.89% 10.82% 8.59% 14.29% 13.80% 15.94% 13.37% 13.14% 10.84% 12.54% 23.20% 9.64% 7.30% 6.91% 7.18% 7.00% 8.64% 10.10% 12.09% 11.98% 14.36% 8.09% -6.64% 12.02% 13.66% 12.69% 12.13% 9.34% 9.25% 9.53% 8.58% 1.71% 5.73% 6.46% 6.77% 7.33% 8.24% 8.43% 9.86% -1.46% 8.47% 7.09% 5.30% 7.09% 3.66% 4.59% 6.53% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% Infinity% 2.93% 2.58% 0.50% 1.23% 4.02% 
      less: net income attributable to noncontrolling interests
    1,000,000 1,000,000 -12,000,000 -55,000,000                          657,000 1,131,000 1,541,000 1,767,000 789,000 104,298,000 98,824,000 103,960,000 102,072,000 93,915,000 91,513,000 -53,731,000 78,681,000 74,375,000 34,893,000 107,021,000 49,823,000 79,161,000 112,996,000 93,326,000 85,342,000 78,576,000 53,184,000 84,333,000 99,769,000 88,212,000 110,597,000 149,751,000 100,559,000 79,624,000 69,216,000 69,216,000 64,861,000 65,006,000 44,650,000 44,650,000 32,181,000 32,181,000 50,552,000 54,266,000 54,266,000 39,671,000 39,671,000          
      net income attributable to oneok
    977,000,000 939,000,000 841,000,000 636,000,000                     320,251,000 309,155,000 311,963,000 337,208,000 292,888,000 313,259,000 281,048,000 264,508,000 63,045,000 165,742,000 71,693,000 87,361,000 90,505,000 92,144,000 85,944,000 83,446,000 25,515,000 82,157,000 76,505,000 60,800,000 94,544,000 64,458,000 61,590,000 93,515,000 90,737,000 62,356,000 919,000 112,521,000 111,542,000 65,219,000 60,993,000 122,865,000 115,001,000 60,321,000 55,142,000 130,130,000 130,130,000 83,074,000 55,295,000 41,724,000 41,724,000 154,539,000 154,539,000 93,445,000 48,042,000 48,042,000 41,679,000 41,679,000 122,285,000         
      less: preferred stock dividends
         1,000,000    1,000,000   275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 275,000 274,000 276,000 217,000                                               
      net income available to common shareholders
    977,000,000 939,000,000  636,000,000 923,000,000 692,000,000 780,000,000 639,000,000 688,000,000 453,000,000 468,000,000 1,049,000,000 484,646,000 431,476,000 414,103,000 390,896,000 379,098,000 391,743,000 341,864,000 385,901,000 307,754,000 312,041,000 134,046,000 -142,132,000 319,976,000 308,880,000 311,688,000 336,933,000 292,613,000 312,984,000 280,773,000 264,233,000 62,771,000 165,466,000 71,476,000                                               
      basic eps
    1,550,000 1,490,000 1,340,000 1,040,000 1,580,000 1,180,000 1,330,000 1,090,000 1,120,000 990,000 1,040,000 2,340,000 1,090 960 930 870 850 880 770 870                                                              
      diluted eps
    1,550,000 1,490,000 1,340,000 1,040,000 1,570,000 1,180,000 1,330,000 1,090,000 1,120,000 990,000 1,040,000 2,340,000 1,080 960 920 870 850 880 770 860                                                              
      average shares
                                                                                     
      basic
    1,700,000 630,600,000 627,200,000 611,400,000 100,000 584,800,000 584,600,000 584,200,000 33,100,000 457,300,000 448,300,000 448,000,000 90,000 447,677,000 447,451,000 447,124,000 115,000 446,634,000 446,337,000 445,894,000 4,736,000 445,103,000 419,722,000 414,282,000 117,000 413,816,000 413,606,000 412,908,000 85,000 412,117,000 411,946,000 409,676,000 29,369,000 380,907,000 211,785,000 211,619 90 211,309 211,075 210,781 70 210,296 210,204 209,874 50 209,489 209,403 209,130 92 206,235 206,143 205,479 -498 205,005 207,292 103,809                          
      diluted
    1,800,000 631,500,000 628,100,000 612,500,000 400,000 586,700,000 585,800,000 585,700,000 33,300,000 458,200,000 449,000,000 449,000,000 179,000 448,217,000 448,182,000 448,404,000 286,000 447,635,000 446,903,000 446,885,000 4,785,000 445,510,000 420,116,000 415,348,000 167,000 415,578,000 415,049,000 415,233,000 160,000 414,847,000 414,641,000 412,173,000 29,431,000 383,419,000 214,012,000 213,602 260 212,870 212,618 211,071 32 210,524 210,477 210,467 -55 210,759 210,516 210,166 287 209,893 208,874 209,458 -488 209,960 211,784 105,926                          
      other operating income
       -6,000,000   -61,000,000 -6,000,000                                                                          
      services
        673,250,000 940,000,000 900,000,000 853,000,000 908,000,000 429,000,000 361,000,000 365,000,000 376,118,000 349,996,000 345,918,000 339,398,000 355,901,000 331,383,000 314,191,000 358,570,000 319,693,000 322,066,000 317,172,000 328,052,000 315,193,000 315,394,000 310,734,000 306,999,000 319,949,000 310,265,000 285,267,000 282,073,000 629,766,000 583,832,000 564,763,000 532,894,000 553,311,000 517,384,000 500,835,000 490,948,000 474,879,000 414,596,000 405,798,000 369,590,000 396,120,000 365,650,000 351,773,000 356,567,000                                  
      allowance for equity funds used during construction
                852,000 734,000 594,000 371,000 197,000 247,000 426,000 812,000 1,315,000 3,084,000 3,854,000 15,409,000 19,640,000 15,792,000 16,942,000 12,441,000 4,634,000 2,294,000 804,000 230,000 32,000 40,000 22,000 13,000 1,000   208,000 461,000 177,000 742,000 799,000 990,000 1,723,000 1,253,000 10,971,000 9,350,000 6,429,000 5,656,000 9,087,000 7,522,000 3,302,000 1,849,000 975,000 710,000 759,000 400,000 466,000 466,000 270,000 266,000 235,000 235,000 247,000 247,000 1,107,000 7,290,000 7,290,000 9,468,000 9,468,000 9,003,000 15,118,000 15,616,000 11,676,000 8,496,000     
      gain on sale of assets
                   -1,570,000 -361,500 -470,000 -707,000 -269,000    -204,000    -60,000 -253,000 -163,000 -96,000  -20,000 -274,000       6,239,000 -726,000 122,000 -6,000 5,066,000 1,534,000 -16,000 15,000 11,539,000 22,000 279,000 41,000 6,133,000 -420,000 966,000 57,000 -172,000 -69,000    3,551,000 16,126,000 -273,000  -786,000  1,560,000 -1,180,000 -1,180,000  3,762,000  329,750 1,310,000 -4,000 13,000 16,000 59,000 -369,000 2,203,000 
      impairment charges
                        3,176,000   604,024,000                                                          
      impairment of equity investments
                           -37,730,000          -4,270,000                                                
      other expense
                    -4,527,500 -5,375,000 -7,498,000 -5,237,000 -4,406,000 -4,496,000 -6,176,000 -3,995,000 -3,979,000 -6,065,000 -4,497,000 -3,462,000 -3,824,000 -3,404,000 -4,391,000 -3,309,000 -1,505,000 -838,000 -21,843,000 -750,000 -1,771,000 -710,000 -941,000 -637,000 2,994,000 -7,508,000 -1,960,000 -1,304,000 -1,246,000 -2,506,000 -1,392,000 -25,534,000 -13,228,000 -1,077,000 -806,000 -2,596,000 -935,000 -919,000 -4,898,000  4,235,000 -13,318,000 -773,000 -2,287,000  -5,764,000 -2,097,000  -7,552,000  -1,053,000 -11,154,000 -995,000  -1,399,000  -3,944,000 -11,128,000 -11,332,000 -407,000  5,666,000 654,000 914,000 645,000 
      income tax benefit
                      -110,069,000 -122,132,000   -43,140,000 55,395,000                                                          
      loss on sale of assets
                        -767,000 -17,000 -339,000  -307,000 -16,000 2,958,000     -89,000   -637,000 7,000 -2,384,250 -5,744,000 413,000 -4,206,000                   -212,000 -510,000 -510,000                     
      basic earnings per common share
                        177.5 700 320 -340 770 750 750 820 522.5 760 680 650                                                  
      diluted earnings per common share
                        177.5 700 320 -340 760 740 750 810 517.5 750 680 640                                                  
      impairment of long-lived assets
                                     15,970,000                                                
      dividends declared per share of common stock
                                0.598 0.825 0.795 0.77 0.745 0.745 0.615 0.615 0.615 0.615 0.615 0.615 0.615 0.605 0.605 0.605 0.59 0.575 0.56 0.4 0.38 0.38 0.36 0.36 0.33 0.33 0.33 0.61 0.56 0.56 0.52 0.52 0.52 0.48 0.46 0.44 0.44 0.44 0.44 0.42 0.42 0.42 0.4 0.4 0.4 0.4 0.4 0.38 0.38 0.36 0.36 0.34 0.34 
      income from continuing operations
                                    64,812,000 166,531,000 175,991,000 186,185,000 194,761,000 194,792,000 180,086,000 175,911,000 -26,279,000 164,698,000 151,020,000 95,837,000 200,766,000 114,452,000 148,760,000 204,737,000 184,063,000 147,698,000 79,495,000 165,705,000 195,875,000 164,988,000 148,938,000 219,450,000                      102,924,000 13,914,000 35,203,000 152,880,000 
      income from discontinued operations, net of tax
                                        -296,000 -576,000 -227,000 -952,000 -1,937,000 -3,860,000 -140,000 -144,000 799,000 -171,000 -8,009,000 1,774,000        762,000                          
      amounts available to common shareholders:
                                                                                     
      income from discontinued operations
                                        -296,000 -576,000 -227,000 -952,000 -1,937,000 -3,860,000 -140,000 -144,000 799,000 -171,000 -8,009,000 1,774,000       267,000 14,012,000                          
      basic earnings per common share:
                                                                                     
      diluted earnings per common share:
                                                                                     
      amounts attributable to oneok:
                                                                                     
      basic earnings per share:
                                                                                     
      diluted earnings per share:
                                                                                     
      net margin
                                            381,134,500 538,137,000 524,959,000 461,442,000 563,495,000 536,941,000 495,480,000 510,627,000 651,654,000 561,188,000 453,389,000 623,452,000 604,320,000 553,972,000 548,962,000 643,587,000 691,169,000 533,993,000 521,648,000 633,549,000 633,549,000 543,775,000 451,370,000 458,077,000 458,077,000 619,319,000 619,319,000 580,255,000 451,854,000 451,854,000 432,426,000 432,426,000 551,411,000 473,761,000 455,026,000 420,828,000 585,912,000 537,399,000 340,160,000 366,509,000 564,627,000 
      operating expenses
                                                                                     
      total operating expenses
                                            192,446,500 252,476,000 252,337,000 264,973,000 261,814,000 247,083,000 244,149,000 216,525,000 368,572,000 331,129,000 325,485,000 349,644,000 310,867,000 310,639,000 315,849,000 317,722,000 327,918,000 285,043,000 304,519,000 303,003,000 303,003,000 306,258,000 280,592,000 279,091,000 279,091,000 281,201,000 281,201,000 308,760,000 276,896,000 276,896,000 281,384,000 281,384,000 259,072,000 256,068,000 264,157,000 247,812,000 252,802,000 281,688,000 237,449,000 230,395,000 238,529,000 
      equity earnings from investments
                                                34,256,000 -52,347,000 25,435,000 33,659,000 30,773,000 27,468,000 26,421,000 25,855,000 30,644,000 28,591,000 29,169,000 34,620,000 33,581,000 32,029,000 29,544,000 32,092,000 32,092,000 30,698,000 29,390,000 20,676,000 20,676,000 21,116,000 21,116,000 17,258,000 20,054,000 20,054,000 14,188,000 14,188,000 21,222,000 26,627,000 29,412,000 17,610,000 27,783,000 24,933,000 22,162,000 18,758,000 24,055,000 
      goodwill impairment
                                                           10,255,000                          
      gain on sale of discontinued operations, net of tax
                                                          267,000 13,250,000                          
      see accompanying notes to consolidated financial statements.
                                                                                     
      earnings per share of common stock
                                                                                     
      net earnings per share, basic
                                                            0.583 0.58 0.52 1.22 1.22 0.78 0.52 0.39 0.39 1.46 1.46 0.89 0.46 0.46 0.4 0.4 1.16 0.65 0.56 0.4 1.38 0.98 0.13 0.32 1.38 
      net earnings per share, diluted
                                                            0.57 0.57 0.51 1.19 1.19 0.76 0.51 0.39 0.39 1.44 1.44 0.87 0.45 0.45 0.39 0.39 1.16 0.65 0.55 0.39 1.36 0.96 0.13 0.31 1.36 
      average shares of common stock
                                                                                     
      basic
                                                            26,305 103,303 105,337 107,020 107,020 58 106,443 106,356 106,356 106,132 106,132 56 105,420 105,420 105,335 105,335 105,162 50 104,446 104,340 104,170 -1,197 103,882 110,879 110,868 
      diluted
                                                            26,931.75 105,970 108,030 109,179 109,179 370 107,651 107,838 107,838 107,410 107,410 259 106,488 106,488 105,950 105,950 105,733 -83 105,636 106,072 105,821 -1,250 105,931 112,986 112,724 
      gain (loss) on sale of assets
                                                                    -273,000  -786,000    3,762,000  664,000         
      net income attributable to noncontrolling interests
                                                                            -41,264,000         
      income before minority interests and income taxes
                                                                             168,419,000 177,418,000 143,536,000 305,165,000 216,512,000 67,050,000 103,115,000 296,040,000 
      minority interests in income of consolidated subsidiaries
                                                                             -53,147,000 -95,354,000 -71,097,000  58,186,000 44,998,000 44,702,000 45,313,000 
      operating revenues, excluding energy trading revenues
                                                                                4,918,031,000 3,998,333,000 2,806,829,000 2,873,068,000 3,797,658,000 
      energy trading revenues
                                                                                 -13,365,000 3,168,000 -1,764,000 1,348,000 
      discontinued operations, net of taxes
                                                                                     
      loss from operations of discontinued components, net of tax
                                                                                     
      depreciation, depletion and amortization
                                                                                   55,644,000 56,450,000 
      income from operations of discontinued components, net of tax
                                                                                     
    Balance Sheets:
    Quarterly
    Annual
      Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-09-25 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-05-04 2011-02-22 2010-12-31 2010-09-30 2010-05-26 2010-03-12 2009-12-31 2009-11-05 2009-07-23 2009-04-30 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 
                                                                                   
        assets
                                                                                   
        current assets
                                                                                   
        cash and cash equivalents
      1,199,000,000 97,000,000 141,000,000 733,000,000 579,000,000 36,000,000 65,000,000 338,000,000 284,000,000 37,000,000 106,000,000 680,000,000 220,227,000 22,215,000 135,774,000 14,610,000 146,391,000 224,337,000 374,377,000 402,413,000 524,496,000 447,129,000 945,732,000 531,630,000 20,958,000 673,309,000 273,397,000 27,814,000 37,200,000 84,464,000 15,295,000 17,474,000 37,200,000 11,676,000 332,371,000 310,808,000 248,875,000 237,410,000 180,854,000 137,219,000 97,619,000 38,371,000 226,193,000 239,411,000 172,812,000 151,403,000 358,560,000 210,227,000 149,313,000 779,524,000 33,681,000 143,947,000 583,618,000 978,825,000 114,920,000 781,192,000 65,953,000 148,407,000 477,573,000 870,086,000 31,034,000 31,034,000 50,483,000 103,251,000 167,433,000 29,399,000 52,180,000 47,038,000 76,753,000 510,058,000 72,944,000 98,744,000 268,740,000 19,105,000 833,745,000 303,288,000 225,510,000 
        accounts receivable
      2,580,000,000 2,484,000,000 2,651,000,000 2,326,000,000 1,252,000,000 1,330,000,000 1,699,000,000 1,705,000,000 1,571,000,000  1,023,000,000 1,153,000,000 1,532,292,000 1,729,192,000 1,778,687,000 1,682,459,000 1,441,786,000 1,497,549,000 1,091,982,000 909,972,000 829,796,000 717,852,000 608,923,000 497,556,000 835,121,000 718,708,000 669,289,000 812,869,000  1,085,075,000 934,664,000 844,218,000  939,595,000 749,345,000 734,844,000 872,430,000 737,224,000 672,059,000 521,436,000 593,979,000 586,157,000 684,899,000 628,064,000 745,494,000 971,285,000 1,097,008,000 883,673,000 1,549,563,000 1,166,994,000 1,158,738,000 1,261,804,000 1,349,371,000 984,724,000 793,842,000 1,154,951,000 1,339,933,000 1,141,132,000 1,125,338,000 1,280,125,000 1,332,726,000 1,332,726,000 858,819,000 904,325,000 1,202,293,000 1,437,994,000 726,719,000 771,196,000 1,014,142,000 1,265,300,000        
        inventories
      871,000,000 858,000,000 905,000,000 748,000,000 616,000,000 671,000,000 798,000,000 639,000,000 869,000,000 348,000,000                                                                    
        other current assets
      535,000,000 457,000,000 419,000,000 431,000,000 258,000,000 270,000,000 212,000,000 252,000,000 300,000,000 145,000,000 244,000,000 158,000,000 171,548,000 281,213,000 288,883,000 187,240,000 165,689,000 146,669,000 154,807,000 155,224,000 132,536,000 83,565,000 92,302,000 59,116,000 82,313,000 79,763,000 69,596,000 56,793,000 9,800,000 61,340,000 57,286,000 106,067,000 9,800,000 64,196,000 51,465,000 108,552,000 45,986,000 50,759,000 58,200,000 54,024,000 39,946,000 76,129,000 155,967,000 175,425,000 173,299,000 119,427,000 118,545,000 102,089,000 171,018,000 160,452,000 163,055,000 154,154,000 175,869,000 220,135,000 208,704,000 155,695,000 185,143,000 202,260,000 161,540,000 106,699,000 149,558,000 149,558,000 178,343,000 138,266,000 89,175,000 238,890,000 208,515,000 189,277,000 71,539,000 324,222,000 365,746,000 118,222,000 216,694,000 116,249,000 206,551,000 253,595,000 326,066,000 
        total current assets
      5,185,000,000 3,896,000,000 4,116,000,000 4,238,000,000 2,876,000,000 2,475,000,000 2,950,000,000 3,108,000,000 3,188,000,000  1,863,000,000 2,569,000,000 2,547,775,000 2,765,322,000 3,026,499,000 2,641,321,000 2,374,374,000 2,666,861,000 2,235,623,000 1,997,594,000 1,869,775,000 1,721,362,000 2,179,859,000 1,488,282,000 1,470,334,000 1,967,585,000 1,401,170,000 1,342,779,000 47,000,000 1,807,908,000 1,433,687,000 1,290,745,000 47,000,000 1,518,865,000 1,447,811,000 1,378,447,000 1,429,684,000 1,369,291,000 1,281,188,000 991,021,000 975,210,000 952,790,000 1,263,796,000 1,321,949,000 1,307,244,000 1,712,787,000 2,059,655,000 1,656,327,000 2,370,802,000 2,882,024,000 1,889,589,000 1,949,663,000 2,764,660,000 2,956,030,000 1,807,319,000 2,609,275,000 2,318,812,000 2,312,043,000 2,529,261,000 2,795,774,000 2,379,045,000 2,379,045,000 1,988,776,000 1,878,255,000 2,108,728,000 2,588,464,000 1,856,962,000 1,793,915,000 2,038,729,000 3,377,602,000 3,020,650,000 3,268,527,000 2,742,664,000 2,951,475,000 3,278,256,000 2,591,169,000 3,080,348,000 
        property, plant and equipment
      54,454,000,000 53,689,000,000 52,888,000,000 52,274,000,000 40,073,000,000 39,627,000,000 38,796,000,000 38,454,000,000 37,626,000,000 11,751,000,000 25,601,000,000 25,252,000,000 25,015,135,000 24,727,153,000 24,394,512,000 24,073,401,000 23,820,539,000 23,580,308,000 23,393,034,000 23,192,548,000 23,072,935,000 22,803,167,000 22,622,747,000 22,136,442,000 22,051,492,000 20,948,267,000 19,806,759,000 18,887,742,000 128,300,000 17,120,187,000 16,363,716,000 15,838,443,000 128,300,000 15,364,289,000 15,241,140,000 15,154,360,000 15,078,497,000 14,943,225,000 14,811,606,000 14,671,934,000 14,530,460,000 14,457,280,000 14,175,037,000 13,908,362,000 13,602,647,000 12,173,835,000 11,737,291,000 11,313,498,000 15,536,156,000 14,944,162,000 14,085,131,000 13,560,483,000 13,088,991,000 12,404,878,000 11,953,916,000 11,495,219,000 11,177,934,000 10,709,417,000 10,350,552,000 10,036,440,000 9,854,485,000 9,854,485,000 9,629,389,000 10,304,502,000 10,205,835,000 10,145,800,000 10,010,406,000 9,880,620,000 9,688,778,000 9,476,619,000 9,067,172,000 8,609,681,000 8,297,604,000 7,893,492,000 7,246,360,000 6,990,392,000 6,816,441,000 
        accumulated depreciation and amortization
      7,296,000,000 6,974,000,000 6,658,000,000 6,339,000,000 6,460,000,000 6,212,000,000 5,989,000,000 5,757,000,000 5,537,000,000  5,372,000,000 5,212,000,000 5,062,609,000 4,937,352,000 4,793,293,000 4,648,169,000 4,500,665,000 4,358,361,000 4,211,515,000 4,067,297,000 3,918,007,000 3,773,852,000 3,641,574,000 3,506,950,000 3,702,807,000 3,585,411,000 3,470,520,000 3,369,710,000 86,400,000 3,159,660,000 3,059,799,000 2,960,254,000 86,400,000 2,785,682,000 2,694,148,000 2,600,776,000 2,507,094,000 2,416,476,000 2,326,984,000 2,234,807,000 2,156,471,000 2,178,687,000 2,099,187,000 2,017,041,000 1,940,210,000 1,931,713,000 1,866,627,000 1,802,704,000 3,238,652,000 3,173,366,000 3,105,646,000 3,039,265,000 2,974,651,000 2,914,496,000 2,855,863,000 2,794,183,000 2,733,601,000 2,690,104,000 2,637,978,000 2,597,547,000 2,541,302,000 2,541,302,000 2,490,417,000 2,457,162,000 2,411,431,000 2,352,142,000 2,311,810,000 2,289,760,000 2,252,123,000 2,212,850,000 2,174,001,000 2,133,100,000 2,091,337,000 2,048,311,000 1,998,367,000   
        net property, plant and equipment
      47,158,000,000 46,715,000,000 46,230,000,000 45,935,000,000 33,613,000,000 33,415,000,000 32,807,000,000 32,697,000,000 32,089,000,000  20,229,000,000 20,040,000,000 19,952,526,000 19,789,801,000 19,601,219,000 19,425,232,000 19,319,874,000 19,221,947,000 19,181,519,000 19,125,251,000 19,154,928,000 19,029,315,000 18,981,173,000 18,629,492,000 18,348,685,000 17,362,856,000 16,336,239,000 15,518,032,000 41,900,000 13,960,527,000 13,303,917,000 12,878,189,000 41,900,000 12,578,607,000 12,546,992,000 12,553,584,000 12,571,403,000 12,526,749,000 12,484,622,000 12,437,127,000 12,373,989,000 12,278,593,000 12,075,850,000 11,891,321,000 11,662,437,000 10,242,122,000 9,870,664,000 9,510,794,000 12,297,504,000 11,770,796,000 10,979,485,000 10,521,218,000 10,114,340,000 9,490,382,000 9,098,053,000 8,701,036,000 8,444,333,000 8,019,313,000 7,712,574,000 7,438,893,000 7,313,183,000 7,313,183,000 7,138,972,000 7,847,340,000 7,794,404,000 7,793,658,000 7,698,596,000 7,590,860,000 7,436,655,000 7,263,769,000 6,893,171,000 6,476,581,000 6,206,267,000 5,845,181,000 5,247,993,000 5,044,351,000 4,901,596,000 
        other assets
      457,000,000 401,000,000 416,000,000 450,000,000 320,000,000 299,000,000 327,000,000 319,000,000 324,000,000 116,000,000 313,000,000 316,000,000 324,132,000 324,839,000 339,690,000 368,073,000 366,457,000 420,388,000 451,246,000 478,247,000 475,296,000 463,496,000 262,463,000 259,643,000 173,425,000 174,147,000 169,318,000 158,423,000 416,900,000 191,170,000 170,124,000 159,428,000 416,900,000 182,265,000 170,785,000 176,755,000 162,998,000 121,529,000 118,980,000 112,614,000 112,598,000 115,716,000 129,700,000 167,724,000 167,466,000 184,935,000 193,032,000 202,626,000 626,899,000 765,194,000 772,040,000 760,920,000 758,664,000 701,491,000 701,512,000 720,174,000 695,965,000 575,095,000 588,886,000 595,649,000 594,008,000 594,008,000 573,152,000 590,672,000 612,435,000 626,713,000 634,898,000 631,998,000 619,731,000 645,073,000 465,882,000 593,759,000 487,562,000 461,367,000 533,851,000 528,003,000 526,346,000 
        investments in unconsolidated affiliates
      2,773,000,000 2,446,000,000 2,405,000,000 2,316,000,000 1,925,000,000 1,937,000,000 1,939,000,000 1,874,000,000 1,795,000,000 922,000,000 885,000,000 789,000,000 801,794,000 803,807,000 801,315,000 797,391,000 797,613,000 797,233,000 800,351,000 807,721,000 805,032,000 790,373,000 790,035,000 810,479,000 861,844,000 870,511,000 881,084,000 950,924,000  981,592,000 986,979,000 997,380,000  1,013,702,000 944,562,000 956,388,000 958,807,000 943,390,000 913,813,000 929,209,000 948,221,000 1,137,059,000 1,146,407,000 1,124,204,000 1,132,653,000 1,128,509,000 1,212,408,000 1,229,054,000 1,229,838,000 1,201,873,000 1,208,787,000 1,220,129,000 1,221,405,000 1,218,282,000 1,210,268,000 1,219,635,000 1,223,398,000 1,224,397,000 1,177,219,000 1,186,588,000 1,188,124,000 1,188,124,000 1,194,087,000 757,232,000 762,435,000 765,163,000 774,347,000 735,394,000 747,990,000 755,492,000 756,449,000 752,952,000 754,304,000 756,260,000 741,310,000 741,851,000 746,383,000 
        goodwill
      8,108,000,000 8,097,000,000 8,094,000,000 8,091,000,000 5,148,000,000 5,112,000,000 5,056,000,000 4,952,000,000 5,682,000,000 4,424,000,000                                                                    
        intangible assets
      2,935,000,000 2,969,000,000 3,002,000,000 3,039,000,000 1,283,000,000 1,297,000,000 1,311,000,000 1,316,000,000 861,000,000 1,124,000,000                                                                    
        total other assets
      14,273,000,000 13,913,000,000 13,917,000,000 13,896,000,000 14,561,000,000 8,645,000,000 8,633,000,000 8,461,000,000 8,662,000,000                                                                     
        total assets
      66,616,000,000 64,524,000,000 64,263,000,000 64,069,000,000 51,050,000,000 44,535,000,000 44,390,000,000 44,266,000,000 43,939,000,000  24,038,000,000 24,464,000,000 24,379,094,000 24,439,243,000 24,526,804,000 23,992,705,000 23,621,613,000 23,872,331,000 23,437,248,000 23,179,929,000 23,078,754,000 22,780,876,000 22,992,467,000 21,969,440,000 21,812,121,000 21,335,907,000 19,751,594,000 18,934,325,000 9,184,800,000 17,911,314,000 16,913,720,000 16,432,347,000 9,184,800,000 16,764,841,000 16,672,923,000 16,067,558,000 16,138,751,000 15,982,035,000 15,822,900,000 15,501,149,000 15,446,111,000 15,508,298,000 15,651,180,000 15,533,073,000 15,304,560,000 14,312,196,000 14,384,538,000 13,653,134,000 17,707,558,000 17,610,343,000 15,842,274,000 15,446,219,000 15,855,275,000 15,364,307,000 13,817,191,000 14,252,076,000 13,696,635,000 13,171,124,000 13,036,333,000 13,039,596,000 12,499,175,000 12,499,175,000 11,929,753,000 12,119,911,000 12,329,192,000 12,827,683,000 12,029,470,000 11,833,723,000 11,939,964,000 13,126,062,000 12,222,063,000 12,169,072,000 11,239,834,000 11,062,034,000 10,922,384,000 9,988,530,000 10,348,911,000 
        liabilities and equity
                                                                                   
        current liabilities
                                                                                   
        current maturities of long-term debt
      1,741,000,000 1,637,000,000 2,059,000,000 1,059,000,000 1,257,000,000 1,354,000,000 1,234,000,000 484,000,000 500,000,000   500,000,000 925,000,000 925,000,000 895,814,000 895,814,000 895,814,000 536,107,000 536,107,000 543,757,000 7,650,000 7,650,000 7,650,000 7,650,000 7,650,000 7,650,000 307,650,000 307,650,000  507,650,000 932,650,000 932,650,000  432,650,000 494,703,000 410,650,000 410,650,000 460,650,000 460,650,000 460,650,000 110,650,000 660,650,000 660,650,000 660,650,000 10,650,000 10,650,000 10,650,000 10,650,000 10,656,000 10,656,000 10,685,000 10,771,000 10,855,000 11,140,000 12,262,000 364,397,000 364,391,000 365,253,000 368,248,000 418,242,000 643,236,000 643,236,000 643,231,000 643,225,000 493,220,000 268,215,000 268,210,000 268,205,000 18,200,000 118,195,000 118,190,000 118,186,000 118,181,000 420,479,000 420,475,000 420,470,000 420,466,000 
        accounts payable
      2,569,000,000 2,453,000,000 2,437,000,000 2,187,000,000 1,247,000,000 1,271,000,000 1,480,000,000 1,564,000,000 1,619,000,000 213,000,000 880,000,000 1,074,000,000 1,359,475,000 1,658,904,000 1,923,761,000 1,729,943,000 1,332,391,000 1,442,984,000 1,052,561,000 929,771,000 719,302,000 624,483,000 755,474,000 742,369,000 1,209,900,000 1,129,849,000 907,377,000 1,027,322,000 12,000,000 1,339,507,000 1,027,467,000 773,054,000 12,000,000 922,820,000 696,834,000 703,278,000 874,731,000 711,817,000 697,833,000 522,317,000 615,982,000 620,568,000 694,914,000 721,535,000 891,413,000 1,221,934,000 1,271,539,000 1,155,114,000 1,503,699,000 1,382,785,000 1,214,322,000 1,205,248,000 1,333,489,000 1,153,750,000 911,977,000 1,110,108,000 1,341,718,000 1,241,633,000 1,194,103,000 1,131,922,000 1,215,468,000 1,215,468,000 885,017,000 830,015,000 965,015,000 1,240,207,000 766,580,000 826,414,000 798,625,000 1,122,761,000 1,294,630,000 1,730,041,000 1,585,757,000 1,436,005,000 979,700,000 1,088,612,000 1,073,934,000 
        commodity imbalances
      225,000,000 238,000,000 319,000,000 260,000,000 14,000,000 15,000,000 23,000,000 26,000,000 22,000,000  30,000,000 22,000,000 42,983,000 39,526,000 49,251,000 24,606,000 39,609,000 22,396,000 14,873,000 16,798,000 11,959,000 13,289,000 17,647,000 13,868,000 25,267,000 19,327,000 26,421,000 38,349,000  22,162,000 26,835,000 38,993,000  111,766,000 39,325,000 30,904,000 60,896,000 43,770,000 38,300,000 38,742,000 38,681,000 30,602,000 31,246,000 39,667,000 64,788,000 74,247,000 93,070,000 82,979,000 82,144,000 94,404,000 75,570,000 75,629,000 90,211,000 57,303,000 37,716,000 163,939,000 63,452,000 105,884,000 131,876,000 74,762,000 94,854,000 94,854,000 98,274,000 71,289,000 96,487,000 186,015,000            
        accrued interest
      450,000,000 474,000,000 461,000,000 511,000,000 253,000,000 355,000,000 268,000,000 381,000,000 218,000,000  214,000,000 137,000,000 233,053,000 120,424,000 235,068,000 136,448,000 235,602,000 140,689,000 244,669,000 140,281,000 245,153,000 140,506,000 217,376,000 121,832,000 190,750,000 122,063,000 166,860,000 113,567,000  111,747,000 135,426,000 97,525,000  97,023,000 111,697,000 90,151,000 112,514,000 104,137,000 119,774,000 104,630,000 129,043,000 108,454,000    102,838,000 105,099,000 102,831,000                              
        other current liabilities
      750,000,000 639,000,000 707,000,000 481,000,000 350,000,000 387,000,000 502,000,000 541,000,000 461,000,000 673,000,000 118,000,000 89,000,000 267,671,000 266,540,000 242,079,000 226,320,000 300,438,000 231,214,000 208,064,000 145,249,000 83,032,000 78,124,000 93,041,000 89,897,000 285,569,000 123,146,000 252,991,000 119,176,000 65,900,000 208,312,000 184,127,000 122,922,000 65,900,000 166,825,000 167,937,000 122,624,000 166,042,000 214,662,000 202,954,000 126,549,000 132,556,000 157,705,000 256,201,000 208,211,000 285,435,000 120,162,000 190,289,000 127,697,000 401,422,000 433,055,000 388,954,000 357,880,000 369,054,000 358,253,000 396,964,000 410,399,000 345,383,000 352,520,000 392,865,000 450,051,000 424,259,000 424,259,000 469,551,000 480,773,000 581,622,000 488,487,000 530,775,000 444,182,000 436,702,000 319,772,000 332,469,000 310,717,000 445,064,000     
        total current liabilities
      5,735,000,000 6,646,000,000 6,183,000,000 4,719,000,000 3,557,000,000 3,979,000,000 4,194,000,000 3,452,000,000 3,298,000,000  1,517,000,000 2,182,000,000 3,051,627,000 4,138,638,000 3,654,833,000 3,482,595,000 3,184,619,000 2,802,870,000 2,394,601,000 2,047,954,000 1,344,547,000 1,094,142,000 1,273,102,000 1,091,392,000 2,020,298,000 1,567,152,000 1,737,373,000 1,689,669,000 692,600,000 2,450,206,000 2,572,081,000 2,050,838,000 692,600,000 2,741,080,000 2,860,519,000 2,731,974,000 2,836,701,000 2,341,964,000 2,188,421,000 1,764,460,000 1,638,266,000 1,960,821,000 2,606,562,000 2,548,720,000 2,392,345,000 1,781,901,000 1,851,171,000 1,891,724,000 2,696,407,000 2,621,710,000 2,648,779,000 2,337,025,000 2,812,994,000 2,439,113,000 2,256,677,000 2,600,323,000 3,246,175,000 2,976,764,000 2,840,617,000 2,301,648,000 3,151,112,000 3,151,112,000 2,596,941,000 2,875,608,000 2,671,516,000 3,338,912,000 2,644,461,000 2,437,043,000 2,447,510,000 4,193,764,000 3,617,469,000 3,729,598,000 2,879,007,000 2,881,667,000 2,505,347,000 2,299,892,000 2,343,832,000 
        long-term debt, excluding current maturities
      31,986,000,000 29,625,000,000 29,781,000,000 31,018,000,000 26,880,000,000 20,339,000,000 20,447,000,000 21,183,000,000 21,450,000,000 4,013,000,000 12,742,000,000 12,728,000,000 12,695,834,000 11,950,660,000 12,872,692,000 12,750,485,000 12,747,636,000 13,640,467,000 13,637,581,000 13,638,767,000 14,228,421,000 14,249,339,000 14,276,232,000 14,146,650,000 12,479,757,000 12,479,452,000 10,754,087,000 10,004,341,000 2,726,400,000 8,325,708,000 7,091,246,000 7,091,751,000 2,726,400,000 8,092,000,000 7,835,606,000 7,919,826,000 7,919,996,000 8,320,144,000 8,320,277,000 8,320,451,000 8,323,582,000 7,773,756,000 7,291,400,000 7,339,766,000 7,192,929,000 7,194,957,000 7,196,988,000 7,199,029,000 7,754,975,000 7,757,159,000 6,511,359,000 6,513,327,000 6,515,372,000 6,517,464,000 5,224,623,000 5,225,849,000 4,529,551,000 4,532,053,000 4,622,616,000 4,976,458,000 3,686,542,000 3,686,542,000 3,692,043,000 3,697,585,000 4,103,333,000 4,334,204,000 4,340,211,000 4,346,285,000 4,602,756,000 4,112,581,000 4,102,250,000 4,104,994,000 4,118,394,000 4,215,046,000 4,210,541,000 3,608,840,000 3,627,043,000 
        deferred credits and other liabilities
                                      237,900,000                                             
        deferred income taxes
      6,112,000,000 5,775,000,000 5,591,000,000 5,451,000,000 3,154,000,000 2,956,000,000 2,745,000,000 2,594,000,000 2,349,000,000  2,168,000,000 2,027,000,000 1,738,525,000 1,592,697,000 1,425,818,000 1,278,319,000 1,166,690,000 981,823,000 881,711,000 814,528,000 669,697,000 582,334,000 475,904,000 442,653,000 536,063,000 418,736,000 347,831,000 270,751,000   31,503,000 116,120,000  474,967,000 563,364,000 1,612,039,000 1,623,822,000 1,573,950,000 1,518,328,000 1,484,745,000 1,436,715,000 1,437,087,000 1,451,833,000 1,430,478,000 1,395,222,000 1,303,548,000 1,253,099,000 1,144,348,000 1,938,262,000 1,776,949,000 1,716,547,000 1,678,887,000 1,592,802,000 1,539,960,000 1,457,896,000 1,408,420,000 1,446,591,000 1,386,959,000 1,288,438,000 1,223,250,000 1,171,997,000 1,171,997,000 1,127,023,000 1,053,931,000 1,033,396,000 1,037,665,000 893,213,000 867,015,000 866,497,000 890,815,000 832,407,000 755,818,000 720,733,000 680,543,000 789,491,000 772,821,000 762,637,000 
        other deferred credits
      626,000,000 574,000,000 588,000,000 748,000,000 572,000,000 552,000,000 559,000,000 479,000,000 466,000,000  330,000,000 329,000,000 331,113,000 375,303,000 387,620,000 414,083,000 431,869,000 527,799,000 531,262,000 496,420,000 706,081,000 618,143,000 632,861,000 631,673,000 525,756,000 626,860,000 538,873,000 501,783,000 237,900,000 350,400,000 357,184,000 366,701,000  339,116,000 337,584,000 334,206,000 321,846,000 296,751,000 293,153,000 273,070,000 264,248,000 278,731,000 276,897,000 290,422,000 281,757,000 229,280,000 237,468,000 229,277,000 472,734,000 763,879,000 791,233,000 712,847,000 701,657,000 692,211,000 672,007,000 638,029,000 674,586,000 592,153,000 584,552,000 575,068,000 566,462,000 566,462,000 616,306,000 617,132,000 628,191,000 662,514,000 738,815,000 762,213,000 765,176,000 715,052,000 493,284,000 495,231,000 485,190,000 486,645,000 577,108,000 571,110,000 548,674,000 
        total deferred credits and other liabilities
      6,738,000,000 6,349,000,000 6,179,000,000 6,199,000,000 3,726,000,000 3,508,000,000 3,304,000,000 3,147,000,000 2,892,000,000  2,561,000,000 2,422,000,000 2,137,748,000 2,037,676,000 1,884,650,000 1,765,931,000 1,674,195,000 1,588,119,000 1,494,680,000 1,396,243,000 1,463,388,000 1,291,283,000 1,202,481,000 1,170,757,000 1,086,115,000 1,070,397,000 911,998,000 798,309,000 237,900,000 482,642,000 411,910,000 420,506,000  415,378,000 411,567,000 1,946,245,000 1,953,139,000 1,879,713,000 1,822,025,000 1,770,731,000 1,717,927,000 1,736,416,000 1,753,859,000 1,751,299,000 1,713,403,000 1,575,943,000 1,543,048,000 1,434,674,000 2,410,996,000 2,540,828,000 2,507,780,000 2,391,734,000 2,294,459,000 2,232,171,000 2,129,903,000 2,046,449,000 2,121,177,000 1,980,247,000 1,875,396,000 1,804,472,000 1,740,680,000 1,740,680,000 1,745,374,000 1,676,144,000 1,674,702,000 1,709,105,000 1,645,023,000 1,637,529,000 1,648,565,000 1,652,178,000 1,385,487,000 1,378,477,000 1,270,179,000 1,194,049,000 1,536,184,000 1,421,959,000 1,368,382,000 
        commitments and contingencies
                                                                                   
        equity
                                                                                   
        preferred stock, 0.01 par value: authorized 20,000 shares; issued and outstanding 0 shares at september 30, 2025; issued and outstanding 20,000 shares at december 31, 2024
                                                                                   
        common stock
      7,000,000 7,000,000 7,000,000 6,000,000 6,000,000 6,000,000 6,000,000 6,000,000 6,000,000  5,000,000 5,000,000 4,749,000 4,749,000 4,749,000 4,749,000 4,749,000 4,749,000 4,749,000 4,749,000 4,749,000 4,749,000 4,749,000 4,450,000 4,450,000 4,450,000 4,450,000 4,450,000  4,450,000 4,450,000 4,450,000  4,159,000 4,147,000 2,458,000  2,458,000 2,458,000 2,458,000  2,458,000 2,458,000 2,458,000  2,458,000 2,458,000 2,458,000  2,458,000 2,458,000                           
        paid-in capital
      20,934,000,000 20,923,000,000 20,721,000,000 16,354,000,000 16,362,000,000 16,338,000,000 16,303,000,000 16,320,000,000 16,315,000,000  7,270,000,000 7,253,000,000 7,253,154,000 7,218,495,000 7,190,457,000 7,176,983,000 7,213,861,000 7,235,255,000 7,247,334,000 7,305,274,000 7,353,396,000 7,448,484,000 7,549,831,000 6,989,453,000 7,403,895,000 7,448,099,000 7,495,458,000 7,527,847,000  7,662,673,000 7,699,934,000 7,735,173,000  6,418,038,000 6,463,130,000 1,232,069,000 1,234,314,000 1,264,041,000 1,294,583,000 1,327,551,000 1,378,444,000 1,477,631,000 1,564,316,000 1,537,166,000 1,541,583,000 1,515,158,000 1,503,582,000 1,377,023,000 1,433,600,000 1,404,086,000 1,278,213,000 1,267,735,000 1,324,698,000 1,337,045,000 1,326,204,000 1,317,489,000 1,418,414,000 1,404,087,000 1,396,042,000 1,384,287,000 1,392,671,000 1,392,671,000 1,382,657,000 1,375,090,000 1,365,591,000             
        accumulated other comprehensive loss
      -65,000,000 -63,000,000 -123,000,000 -96,000,000 -68,000,000 -108,000,000 -128,000,000 -33,000,000 -68,000,000  -75,000,000 -99,000,000 -108,256,000 -199,473,000 -366,755,000 -467,672,000 -471,351,000 -661,836,000 -601,443,000 -465,596,000 -551,449,000 -530,618,000 -524,903,000 -499,386,000 -374,000,000 -421,104,000 -336,396,000 -269,524,000  -158,138,000 -178,589,000 -174,692,000  -181,771,000 -176,085,000 -139,062,000 -154,350,000 -154,351,000 -159,246,000 -134,614,000 -127,242,000 -136,112,000 -135,334,000 -139,892,000 -136,353,000 -107,656,000 -113,127,000 -109,913,000 -121,987,000 -219,492,000 -211,970,000 -223,153,000 -216,798,000 -240,476,000 -205,640,000 -178,845,000 -206,121,000 -174,573,000 -131,266,000 -135,137,000 -108,802,000 -108,802,000 -90,268,000 -103,486,000 -105,564,000 -118,613,000 -118,540,000 -82,960,000 -56,152,000 -70,616,000 -68,763,000 -113,396,000      
        retained earnings
      2,048,000,000 1,765,000,000 1,569,000,000 1,579,000,000 1,237,000,000 1,126,000,000 927,000,000 868,000,000 737,000,000  711,000,000 672,000,000 50,396,000          -7,536,000 -141,857,000            30,887,000       23,119,000 72,976,000 138,128,000 170,249,000 225,423,000 280,242,000 2,020,815,000 2,008,471,000 2,024,482,000 2,097,764,000 2,059,024,000 2,015,008,000 2,017,460,000 2,019,864,000 1,960,374,000 1,903,056,000 1,900,716,000 1,901,279,000 1,826,800,000 1,826,800,000 1,794,842,000 1,788,501,000 1,793,548,000 1,685,710,000 1,636,572,000 1,632,795,000 1,633,238,000 1,553,033,000 1,534,241,000 1,517,982,000 1,515,793,000 1,411,492,000 1,345,914,000 1,369,398,000 1,371,948,000 
        treasury stock
      -843,000,000 -802,000,000 -810,000,000 -807,000,000 -650,000,000 -653,000,000 -663,000,000 -677,000,000 -691,000,000  -693,000,000 -699,000,000 -706,158,000 -711,502,000 -713,822,000 -720,366,000 -732,096,000 -737,293,000 -740,254,000 -747,462,000 -764,298,000 -776,503,000 -781,489,000 -792,019,000 -808,394,000 -812,539,000 -815,376,000 -820,767,000  -856,227,000 -860,935,000 -863,485,000  -880,931,000 -883,445,000 -887,970,000 -893,677,000 -897,852,000 -900,366,000 -908,507,000 -917,862,000 -929,505,000 -937,051,000 -942,550,000 -953,701,000 -956,977,000 -961,911,000 -965,310,000 -997,035,000 -1,005,829,000 -1,007,834,000 -1,010,450,000 -1,039,773,000 -1,048,329,000                 -708,965,000 -708,964,000  -710,126,000 -719,118,000 -730,180,000  
        total oneok shareholders' equity
      22,081,000,000 21,830,000,000                                                     2,089,540,000 2,256,152,000 2,238,573,000 2,185,960,000 2,217,089,000 2,499,084,000 2,448,623,000 2,448,623,000 2,414,479,000 2,387,229,000 2,380,697,000 2,207,194,000            
        noncontrolling interests in consolidated subsidiaries
      76,000,000 74,000,000 756,000,000 5,097,000,000                           173,623,000 167,806,000  156,888,000 157,484,000 3,231,131,000 3,240,170,000 3,225,918,000 3,254,748,000 3,358,619,000 3,430,538,000 3,622,833,000 3,481,851,000 3,363,130,000 3,413,768,000 3,136,163,000 3,136,906,000 2,543,207,000 2,507,329,000 2,500,952,000 2,089,007,000 2,069,779,000 2,102,841,000 2,109,853,000 2,116,448,000 2,123,303,000 1,561,159,000 1,496,100,000 1,480,615,000 1,457,934,000 1,472,218,000 1,472,218,000 1,480,916,000 1,483,345,000 1,498,944,000 1,238,268,000 1,260,160,000 1,250,473,000 1,057,840,000         
        total equity
      22,157,000,000 21,904,000,000 22,120,000,000 22,133,000,000 16,887,000,000 16,709,000,000 16,445,000,000 16,484,000,000 16,299,000,000  7,218,000,000 7,132,000,000 6,493,885,000 6,312,269,000 6,114,629,000 5,993,694,000 6,015,163,000 5,840,875,000 5,910,386,000 6,096,965,000 6,042,398,000 6,146,112,000 6,240,652,000 5,560,641,000 6,225,951,000 6,218,906,000 6,348,136,000 6,442,006,000 5,527,900,000 6,652,758,000 6,838,483,000 6,869,252,000 5,527,900,000 5,516,383,000 5,565,231,000 3,469,513,000 3,428,915,000 3,440,214,000 3,492,177,000 3,645,507,000 3,766,336,000 4,037,305,000 3,999,359,000 3,893,288,000 4,005,883,000 3,759,395,000 3,793,331,000 3,127,707,000 4,845,180,000 4,690,646,000 4,174,356,000 4,204,133,000 4,232,450,000 4,175,559,000 4,205,988,000 4,379,455,000 3,799,732,000 3,682,060,000 3,697,704,000 3,957,018,000 3,920,841,000 3,920,841,000 3,895,395,000 3,870,574,000              
        total liabilities and equity
      66,616,000,000 64,524,000,000 64,263,000,000 64,069,000,000 51,050,000,000 44,535,000,000 44,390,000,000 44,266,000,000 43,939,000,000  24,038,000,000 24,464,000,000 24,379,094,000 24,439,243,000 24,526,804,000 23,992,705,000 23,621,613,000 23,872,331,000 23,437,248,000 23,179,929,000 23,078,754,000 22,780,876,000 22,992,467,000 21,969,440,000 21,812,121,000 21,335,907,000 19,751,594,000 18,934,325,000 9,184,800,000 17,911,314,000 16,913,720,000 16,432,347,000 9,184,800,000 16,764,841,000 16,672,923,000 16,067,558,000 16,138,751,000 15,982,035,000 15,822,900,000 15,501,149,000 15,446,111,000 15,508,298,000 15,651,180,000 15,533,073,000 15,304,560,000 14,312,196,000 14,384,538,000 13,653,134,000 17,707,558,000 17,610,343,000 15,842,274,000 15,446,219,000 15,855,275,000 15,364,307,000 13,817,191,000 14,252,076,000 13,696,635,000 13,171,124,000 13,036,333,000 13,039,596,000 12,499,175,000 12,499,175,000 11,929,753,000 12,119,911,000              
        short-term borrowings
       1,205,000,000 200,000,000   180,000,000 320,000,000       901,277,000  78,000,000         220,000,000    614,700,000 120,000,000 156,000,000  614,700,000 932,250,000 1,274,407,000 1,290,729,000 1,110,277,000 693,500,000 576,307,000 444,567,000 546,340,000                                     
        preferred stock, 0.01 par value: authorized 20,000 shares; issued and outstanding 0 shares at june 30, 2025; issued and outstanding 20,000 shares at december 31, 2024
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at march 31, 2025, and december 31, 2024
                                                                                   
        total oneok shareholders’ equity
        21,364,000,000 17,036,000,000                          6,652,758,000 6,664,860,000 6,701,446,000  5,359,495,000 5,407,747,000 238,382,000 188,745,000 214,296,000 237,429,000 286,888,000 335,798,000 414,472,000 517,508,000 530,158,000 592,115,000 623,232,000 656,425,000 584,500,000 2,337,851,000 2,189,694,000 2,085,349,000 2,134,354,000 2,129,609,000 2,065,706,000             2,139,615,000 2,162,393,000 2,183,293,000         
        accrued taxes
         221,000,000 216,000,000 165,000,000 169,000,000 215,000,000 220,000,000  130,000,000 150,000,000     97,537,000 121,228,000 94,048,000 65,862,000 89,428,000 103,778,000 77,752,000 61,057,000  79,358,000                                                    
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at dec. 31, 2024, and at dec. 31, 2023
                                                                                   
        materials and supplies
          157,000,000 153,000,000 153,000,000 148,000,000 142,000,000  146,000,000 157,000,000 148,985,000 155,158,000 154,024,000 148,302,000 153,019,000 147,800,000 144,824,000 143,583,000 143,178,000 158,950,000 313,372,000 255,071,000 201,749,000 192,933,000 177,517,000 163,731,000  128,574,000 113,831,000 98,695,000  77,366,000 75,172,000  60,912,000 81,701,000 85,127,000 83,144,000 76,696,000 62,604,000                                    
        cash held for acquisitions
          5,885,000,000                                                                         
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at sept. 30, 2024, and dec. 31, 2023
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at june 30, 2024, and december 31, 2023
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at march 31, 2024, and december 31, 2023
                                                                                   
        operating lease liability
             23,000,000 32,000,000  12,000,000 12,000,000 12,289,000 12,417,000 12,305,000 12,583,000 13,783,000 14,378,000 14,570,000 13,408,000 13,610,000 13,646,000 13,564,000 13,425,000                                                      
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at december 31, 2023, and at december 31, 2022
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at september 30, 2023, and december 31, 2022
                                                                                   
        magellan public common units outstanding
               202,100,000                                                                    
        cash consideration per magellan unit
               25,000,000                                                                    
        cash consideration
               5,052,000,000                                                                    
        oneok exchange ratio per magellan unit
               667,000                                                                    
        shares of oneok common stock issued
               134,800,000                                                                    
        oneok common stock closing price on september 25, 2023
               66,540,000                                                                    
        fair value of common stock issued
               8,969,000,000                                                                    
        fair value of magellan replacement equity awards
               93,000,000                                                                    
        equity consideration
               9,062,000,000                                                                    
        total consideration
               14,114,000,000                                                                    
        assets acquired:
                                                                                   
        accounts receivables
               333,000,000                                                                    
        total assets acquired
               14,776,000,000                                                                    
        liabilities assumed:
                                                                                   
        other deferred credits and liabilities
               187,000,000                                                                    
        total liabilities assumed
               5,086,000,000                                                                    
        total identifiable net assets
               9,690,000,000                                                                    
        total purchase price
               14,114,000,000                                                                    
        ngls and natural gas in storage
                314,000,000 399,000,000 431,740,000 538,018,000 619,880,000 584,104,000 427,880,000 628,110,000 454,760,000 369,604,000 227,810,000 300,577,000 201,883,000 131,041,000                                                      
        investments and other assets
                                                                                   
        goodwill and net intangible assets
                748,000,000 750,000,000 752,867,000 755,474,000 758,081,000 760,688,000 763,295,000 765,902,000 768,509,000                                                           
        total investments and other assets
                1,946,000,000 1,855,000,000 1,878,793,000 1,884,120,000 1,899,086,000 1,926,152,000 1,927,365,000 1,983,523,000 2,020,106,000 2,057,084,000 2,054,051,000 2,030,199,000 1,831,435,000 1,851,666,000 1,993,102,000 2,005,466,000 2,014,185,000 2,073,514,000 9,095,900,000 2,142,879,000 2,176,116,000 2,263,413,000 9,095,900,000 2,667,369,000 2,678,120,000 2,135,527,000 2,137,664,000 2,085,995,000 2,057,090,000 2,073,001,000 2,096,912,000 2,276,915,000 2,311,534,000 2,319,803,000 2,334,879,000 2,357,287,000 2,454,219,000 2,486,013,000 3,039,252,000 2,957,523,000 2,973,200,000 2,975,338,000 2,976,275,000 2,917,895,000 2,911,819,000 2,941,765,000 2,933,490,000 2,839,768,000 2,794,498,000 2,804,929,000 2,806,947,000 2,806,947,000 2,802,005,000 2,394,316,000 2,426,060,000 2,445,561,000 2,473,912,000 2,448,948,000 2,464,580,000 2,484,691,000 2,308,242,000 2,423,964,000 2,290,903,000     
        oneok, inc. and subsidiaries
                                                                                   
        consolidated balance sheets
                                                                                   
        oneok shareholders’ equity:
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at june 30, 2023, and december 31, 2022
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at march 31, 2023, and december 31, 2022
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at december 31, 2022, and at december 31, 2021
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at september 30, 2022, and december 31, 2021
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at june 30, 2022, and december 31, 2021
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at march 31, 2022, and december 31, 2021
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at december 31, 2021, and at december 31, 2020
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at september 30, 2021, and december 31, 2020
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at june 30, 2021, and december 31, 2020
                                                                                   
        goodwill and intangible assets
                         771,116,000 773,723,000 776,330,000 778,937,000 781,544,000 957,833,000 960,808,000 963,783,000 964,167,000  970,117,000 987,510,000 990,485,000  996,435,000 999,409,000 1,002,384,000 1,005,359,000 1,008,334,000 1,011,309,000 1,014,284,000 1,017,258,000 1,020,233,000 1,023,209,000 1,011,765,000 1,014,740,000 1,017,715,000 1,018,679,000 1,021,620,000 1,182,515,000 990,456,000 992,373,000 994,289,000 996,206,000 998,122,000 1,000,039,000 1,001,956,000 1,014,127,000 1,016,044,000 1,020,865,000 1,020,977,000 1,022,894,000 1,022,894,000 1,024,810,000 1,026,726,000 1,028,643,000 1,030,560,000 1,032,476,000 1,034,393,000 1,036,309,000 1,038,226,000 1,040,142,000 1,042,059,000 1,041,857,000 1,043,773,000 1,045,690,000 1,047,606,000 1,049,523,000 
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at march 31, 2021, and december 31, 2020
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at december 31, 2020, and at december 31, 2019
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at september 30, 2020, and december 31, 2019
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at june 30, 2020, and december 31, 2019
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at march 31, 2020, and december 31, 2019
                                                                                   
        natural gas and ngls in storage
                              304,926,000 283,545,000 184,950,000                                                   
        finance lease liability
                              1,949,000 1,901,000 1,854,000 1,809,000                                                  
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at december 31, 2019, and at december 31, 2018
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at september 30, 2019, and december 31, 2018
                                                                                   
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at june 30, 2019, and december 31, 2018
                                                                                   
        natural gas and natural gas liquids in storage
                                 243,223,000  426,293,000 285,776,000 185,298,000  314,266,000 200,133,000 193,339,000 140,034,000 217,769,000 245,946,000 156,075,000 128,084,000 142,308,000 150,137,000 218,691,000 134,134,000 338,345,000 335,116,000 231,237,000                              
        preferred stock, 0.01 par value: authorized and issued 20,000 shares at march 31, 2019, and december 31, 2018
                                                                                   
        investments
                                  5,752,100,000    5,752,100,000                                             
        intercompany notes receivable
                                  2,926,900,000    2,926,900,000                                             
        intercompany debt
                                                                                   
        equity excluding noncontrolling interests in consolidated subsidiaries
                                  5,527,900,000    5,527,900,000                                             
        preferred stock, 0.01 par value: issued 20,000 shares at september 30, 2018, and december 31, 2017
                                                                                   
        preferred stock, 0.01 par value: issued 20,000 shares at june 30, 2018, and december 31, 2017
                                                                                   
        preferred stock, 0.01 par value: issued 20,000 shares at march 31, 2018 and december 31, 2017
                                                                                   
        assets of discontinued operations
                                          551,000 658,000 702,000 381,000 205,000 16,619,000 15,354,000 20,691,000 16,717,000 58,080,000 57,356,000 146,122,000         74,136,000                     
        liabilities of discontinued operations
                                          19,841,000 22,540,000 25,359,000 28,258,000 29,235,000 29,980,000 32,708,000 38,263,000 44,901,000 64,387,000 66,138,000 153,682,000         12,815,000                     
        preferred stock, 0.01 par value: issued 20,000 shares at september 30, 2017, and no shares at december 31, 2016
                                                                                   
        preferred stock, 0.01 par value: issued 20,000 shares at june 30, 2017, and no shares at december 31, 2016
                                                                                   
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding210,681,661 shares at december 31, 2016; issued 245,811,180 shares andoutstanding 209,731,028 shares at december 31, 2015
                                          2,458,000                                         
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding209,731,028 shares at december 31, 2015; issued 245,811,180 shares andoutstanding 208,322,247 shares at december 31, 2014
                                              2,458,000                                     
        notes payable
                                               287,272,000 870,484,000 825,475,000 1,055,296,000   125,000,000 564,462,000 562,329,000 834,000,000 551,250,000 817,170,000 676,747,000 595,931,000 419,757,000 841,982,000 650,000,000 526,633,000  556,855,000 556,855,000 326,385,000 680,000,000 310,000,000 881,870,000 824,000,000 689,910,000 986,700,000 2,270,000,000 1,322,214,000 801,493,000 265,600,000 202,600,000 365,000,000 105,000,000  
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding208,322,247 shares at december 31, 2014; issued 245,811,180 shares andoutstanding 206,618,877 shares at december 31, 2013
                                                  2,458,000                                 
        accrued taxes other than income
                                                   90,681,000                                
        gas and natural gas liquids in storage
                                                      417,077,000 664,213,000 434,996,000 302,473,000 517,014,000 644,719,000 561,802,000 299,130,000 549,915,000 658,059,000 574,173,000 407,671,000 708,933,000 708,933,000 703,677,000 572,941,000 397,254,000 583,127,000 657,403,000 564,530,000 443,244,000 858,966,000 1,120,077,000 902,129,000 329,307,000 841,362,000 971,788,000 787,650,000 499,058,000 
        energy marketing and risk management assets
                                                      1,687,000   11,656,000 48,577,000 70,324,000 90,335,000 54,368,000 40,280,000 56,301,000 58,761,000 56,431,000 61,940,000 61,940,000 99,180,000 88,183,000 156,086,000 113,039,000 127,877,000 168,457,000 280,962,000 362,808,000 314,905,000 263,386,000 129,049,000 168,609,000 295,549,000 169,330,000 137,726,000 
        energy marketing and risk management liabilities
                                                      4,032,000   10,323,000 9,990,000 25,856,000 138,028,000 94,573,000 137,680,000 130,993,000 45,704,000 51,123,000 22,800,000 22,800,000 36,774,000 35,628,000 75,119,000 65,162,000 49,234,000 41,485,000 77,084,000 175,006,000 303,574,000 389,542,000 244,632,000 133,903,000 249,572,000 253,623,000 308,445,000 
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding206,618,877 shares at december 31, 2013; issued 245,811,180 shares andoutstanding 204,935,043 shares at december 31, 2012
                                                      2,458,000                             
        energy marketing and risk-management assets
                                                       16,437,000 23,549,000                           
        energy marketing and risk-management liabilities
                                                       5,530,000 908,000                           
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding 206,088,765 shares at march 31, 2013; issued 245,811,180 shares andoutstanding 204,935,043 shares at december 31, 2012
                                                         2,458,000                          
        see accompanying notes to consolidated financial statements.
                                                                                   
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding204,935,043 shares at december 31, 2012; issued 245,809,848 shares andoutstanding 206,509,960 shares at december 31, 2011
                                                          2,458,000                         
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding 204,598,717 shares at september 30, 2012; issued 245,809,848 shares andoutstanding 206,509,960 shares at december 31, 2011
                                                           2,458,000                        
        oneok shareholders' equity:
                                                                                   
        authorized 600,000,000 shares; issued 245,811,180 shares and outstanding
                                                                                   
        205,041,894 shares at june 30, 2012; issued 245,809,848 shares and
                                                                                   
        outstanding 206,509,960 shares at december 31, 2011
                                                            2,458,000                       
        39,299,888 shares at december 31, 2011
                                                            -1,050,942,000                       
        authorized 300,000,000 shares; issued 122,905,591 shares and outstanding
                                                                                   
        103,922,403 shares at march 31, 2012; issued 122,904,924 shares and
                                                                                   
        outstanding 103,254,980 shares at december 31, 2011
                                                             1,229,000                      
        19,649,944 shares at december 31, 2011
                                                             -903,585,000                      
        authorized 300,000,000 shares; issued 122,904,924 shares and outstanding
                                                                                   
        103,254,980 shares at december 31, 2011; issued 122,815,636 shares and
                                                                                   
        outstanding 106,815,582 shares at december 31, 2010
                                                              1,229,000 1,229,000 1,229,000 1,228,000                  
        16,000,054 shares at december 31, 2010
                                                              -935,323,000 -947,839,000 -949,632,000 -652,573,000                  
        authorized 300,000,000 shares; issued 122,895,643 shares and outstanding
                                                                                   
        102,982,759 shares at september 30, 2011; issued 122,815,636 shares and
                                                                                   
        authorized 300,000,000 shares; issued 122,891,704 shares and outstanding
                                                                                   
        103,526,104 shares at june 30, 2011; issued 122,815,636 shares and
                                                                                   
        authorized 300,000,000 shares; issued 122,847,421 shares and outstanding
                                                                                   
        107,105,747 shares at march 31, 2011; issued 122,815,636 shares and
                                                                                   
        authorized 300,000,000 shares; issued 122,815,636 shares and outstanding
                                                                                   
        106,815,582 shares at december 31, 2010; issued 122,394,015 shares and
                                                                                   
        outstanding 105,906,776 shares at december 31, 2009
                                                                  1,228,000 1,228,000 1,227,000 1,227,000 1,225,000             
        16,487,239 shares at december 31, 2009
                                                                  -663,274,000 -663,274,000 -673,979,000 -674,103,000 -674,103,000             
        authorized 300,000,000 shares; issued 122,725,272 shares and outstanding
                                                                                   
        106,466,921 shares at september 30, 2010; issued 122,394,015 shares and
                                                                                   
        authorized 300,000,000 shares; issued 122,676,368 shares and outstanding
                                                                                   
        106,415,009 shares at june 30, 2010; issued 122,394,015 shares and
                                                                                   
        liabilities and shareholders' equity
                                                                                   
        shareholders' equity
                                                                                   
        authorized 300,000,000 shares; issued 122,545,085 shares and outstanding
                                                                                   
        106,283,759 shares at march 31, 2010; issued 122,394,015 shares and
                                                                                   
        total shareholders' equity
                                                                      3,879,641,000 3,445,462,000            
        total liabilities and shareholders' equity
                                                                      12,329,192,000 12,827,683,000            
        oneok shareholders' equity
                                                                                   
        authorized 300,000,000 shares; issued 122,394,015 shares and outstanding
                                                                                   
        105,906,776 shares at december 31, 2009; issued 121,647,007 shares and
                                                                                   
        outstanding 104,845,231 shares at december 31, 2008
                                                                       1,224,000 1,223,000 1,222,000          
        paid in capital
                                                                       1,322,340,000 1,317,167,000 1,308,141,000 1,301,849,000 1,301,153,000 1,300,286,000 1,286,461,000 1,275,103,000 1,273,800,000 1,275,226,000 1,278,866,000 1,263,112,000 
        16,801,776 shares at december 31, 2008
                                                                       -683,467,000 -696,807,000 -696,805,000          
        commodity exchanges and imbalances
                                                                        84,268,000 53,417,000 49,734,000 56,248,000 80,372,000 156,581,000 75,302,000 82,938,000 47,178,000 22,301,000 183,064,000 
        liabilities and shareholders’ equity
                                                                                   
        shareholders’ equity
                                                                                   
        oneok shareholders’ equity
                                                                                   
        authorized 300,000,000 shares; issued 122,274,466 shares and outstanding
                                                                                   
        105,465,408 shares at september 30, 2009; issued 121,647,007 shares and
                                                                                   
        total shareholders’ equity
                                                                        3,399,775,000 3,412,866,000 3,241,133,000 2,088,170,000 2,058,015,000 1,983,298,000 2,006,792,000 1,969,308,000 1,875,508,000 1,861,585,000 2,210,776,000 
        total liabilities and shareholders’ equity
                                                                        12,029,470,000 11,833,723,000 11,939,964,000 13,126,062,000 12,222,063,000 12,169,072,000 11,239,834,000 11,062,034,000 10,922,384,000 9,988,530,000 10,348,911,000 
        authorized 300,000,000 shares; issued 122,180,571 shares and outstanding
                                                                                   
        105,371,561 shares at june 30, 2009; issued 121,647,007 shares and
                                                                                   
        deposits
                                                                          102,355,000         
        authorized 300,000,000 shares; issued 122,103,602 shares
                                                                                   
        and outstanding 105,293,253 shares at march 31, 2009;
                                                                                   
        issued 121,647,007 shares and outstanding 104,845,231
                                                                                   
        shares at december 31, 2008
                                                                          1,221,000         
        2009 and 16,801,776 shares at december 31, 2008
                                                                          -696,863,000         
        minority interests in consolidated subsidiaries
                                                                           1,079,369,000 1,058,842,000 972,705,000 965,462,000 801,964,000 794,804,000 796,254,000 798,878,000 
        authorized 300,000,000 shares; issued 121,647,007 shares
                                                                                   
        and outstanding 104,845,231 shares at december 31, 2008;
                                                                                   
        issued 121,115,217 shares and outstanding 103,987,476
                                                                                   
        shares at december 31, 2007
                                                                           1,216,000        
        2008 and 17,127,741 shares at december 31, 2007
                                                                           -696,616,000        
        trade accounts and notes receivable
                                                                            1,066,606,000 1,507,639,000 1,723,572,000 1,723,212,000 923,445,000 1,028,968,000 1,286,444,000 
        authorized 300,000,000 shares; issued 121,568,386 shares and outstanding 104,468,756 shares at september 30, 2008; issued 121,115,217 shares and outstanding 103,987,476 shares at december 31, 2007
                                                                            1,216,000       
        fair value of firm commitments
                                                                             221,826,000      
        authorized 300,000,000 shares; issued 121,528,787 shares and outstanding 104,429,175 shares at june 30, 2008; issued 121,115,217 shares and outstanding 103,987,476 shares at december 31, 2007
                                                                             1,215,000      
        authorized 300,000,000 shares; issued 121,380,458 shares and outstanding 104,252,433 shares at march 31, 2008; issued 121,115,217 shares and outstanding 103,987,476 shares at december 31, 2007
                                                                              1,214,000     
        accumulated other comprehensive income
                                                                               -7,069,000 -27,724,000 -57,709,000  
        short-term investments
                                                                                 26,037,000 538,030,000 
        deferred charges and other assets
                                                                                   
        total deferred charges and other assets
                                                                               2,265,378,000 2,396,135,000 2,353,010,000 2,366,967,000 
        other
                                                                               436,585,000 295,526,000 266,275,000 357,923,000 
        authorized 300,000,000 shares; issued 121,115,217 shares and outstanding 103,987,476 shares at december 31, 2007; issued 120,333,908 shares and outstanding 110,678,499 shares at december 31, 2006
                                                                               1,211,000    
        authorized 300,000,000 shares; issued 121,080,200 shares and outstanding 103,735,511 shares at september 30, 2007; issued 120,333,908 shares and outstanding 110,678,499 shares at december 31, 2006
                                                                                1,210,000   
        accumulated depreciation, depletion and amortization
                                                                                 1,946,041,000 1,914,845,000 
        authorized 300,000,000 shares; issued 120,999,567 shares and outstanding 103,842,104 shares at june 30, 2007; issued 120,333,908 shares and outstanding 110,678,499 shares at december 31, 2006
                                                                                 1,210,000  
        commodity exchanges
                                                                                  67,514,000 
        authorized 300,000,000 shares; issued 120,637,951 shares and outstanding 110,982,237 shares at march 31, 2007; issued 120,333,908 shares and outstanding 110,678,499 shares at december 31, 2006
                                                                                  1,206,000 
      Cashflow Statements:
      Quarterly
      Annual
        Unit: USD2025-09-30 2025-06-30 2025-03-31 2024-12-31 2024-09-30 2024-06-30 2024-03-31 2023-12-31 2023-09-30 2023-06-30 2023-03-31 2022-12-31 2022-09-30 2022-06-30 2022-03-31 2021-12-31 2021-09-30 2021-06-30 2021-03-31 2020-12-31 2020-09-30 2020-06-30 2020-03-31 2019-12-31 2019-09-30 2019-06-30 2019-03-31 2018-12-31 2018-09-30 2018-06-30 2018-03-31 2017-12-31 2017-09-30 2017-06-30 2017-03-31 2016-12-31 2016-09-30 2016-06-30 2016-03-31 2015-12-31 2015-09-30 2015-06-30 2015-03-31 2014-12-31 2014-09-30 2014-06-30 2014-03-31 2013-12-31 2013-09-30 2013-06-30 2013-03-31 2012-12-31 2012-09-30 2012-06-30 2012-03-31 2011-12-31 2011-09-30 2011-06-30 2011-05-04 2011-03-31 2010-12-31 2010-09-30 2010-05-26 2010-03-31 2010-03-12 2009-12-31 2009-09-30 2009-06-30 2009-04-30 2009-03-31 2008-12-31 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 
                                                                                      
          operating activities
                                                                                      
          net income
        940,000,000 853,000,000 691,000,000 1,000,000,000 693,000,000 780,000,000 639,000,000 688,000,000 454,000,000 468,000,000 1,049,000,000 484,921,000 431,751,000 414,378,000 391,171,000 379,373,000 392,018,000 342,139,000 386,176,000 308,029,000 312,316,000 134,321,000 -141,857,000 320,251,000 309,155,000 311,963,000 337,208,000 292,888,000 313,916,000 282,179,000 266,049,000 64,812,000 166,531,000 175,991,000 186,185,000 194,465,000 194,216,000 179,859,000 174,959,000 -28,216,000 160,838,000 150,880,000 95,693,000 201,565,000 114,281,000 140,751,000 206,511,000 184,063,000 147,698,000 79,495,000 165,705,000 195,875,000 164,988,000 149,205,000 233,462,000 264,752,000 160,880,000 134,766,000 199,346,000 199,346,000 147,935,000 120,301,000 86,374,000 186,720,000 186,720,000 143,997,000 102,308,000 81,350,000 163,549,000 163,549,000 68,174,000 58,033,000 41,865,000 143,837,000 102,924,000 13,914,000 35,203,000 152,880,000 
          adjustments to reconcile net income to net cash from operating activities:
                                                                                      
          depreciation and amortization
        378,000,000 368,000,000 380,000,000 344,000,000 274,000,000 262,000,000 254,000,000 260,000,000 177,000,000 170,000,000 162,000,000 157,415,000 157,102,000 157,757,000 153,858,000 153,118,000 154,542,000 156,921,000 157,120,000 152,648,000 153,245,000 140,416,000 132,353,000 125,983,000 121,430,000 114,964,000 114,158,000 110,649,000 107,383,000 106,288,000 104,237,000 103,769,000 102,298,000 100,849,000 99,419,000 99,310,000 98,550,000 99,247,000 94,478,000 93,379,000 88,299,000 86,987,000 85,955,000 80,555,000 74,588,000 72,127,000 78,768,000 108,034,000 94,267,000 91,855,000 90,221,000 86,415,000 81,434,000 84,586,000 83,417,000 78,087,000 75,986,000 78,824,000 79,391,000 79,391,000 76,717,000 77,233,000 75,511,000 77,856,000 77,856,000 73,298,000 72,318,000 71,249,000 72,126,000 72,126,000 64,498,000 60,249,000 59,701,000 59,479,000 59,506,000    
          equity in net earnings from investments
        -92,000,000 -81,000,000 -108,000,000 -183,000,000 -92,000,000 -88,000,000 -76,000,000 -70,000,000 -49,000,000 -43,000,000 -40,000,000 -36,570,000 -39,180,000 -35,630,000 -36,340,000 -34,907,000 -28,573,000 -25,720,000 -33,320,000 -35,240,000 -38,046,000 -25,328,000 -44,627,000 -39,366,000 -37,576,000 -34,118,000 -43,481,000 -42,313,000 -39,313,000 -36,570,000 -40,187,000 -40,293,000 -40,058,000 -39,363,000 -39,564,000 -39,249,000 -35,155,000 -32,372,000 -32,914,000 -32,095,000 -32,244,000 -30,040,000 -30,921,000                                    
          distributions received from unconsolidated affiliates
        95,000,000 97,000,000 101,000,000 138,000,000 85,000,000 89,000,000 78,000,000 68,000,000 48,000,000 43,000,000 43,000,000 37,063,000 38,167,000 35,789,000 35,699,000 34,621,000 29,903,000 27,624,000 30,862,000 34,757,000 37,939,000 30,079,000 41,577,000 42,300,000 39,435,000 35,805,000 45,936,000 44,704,000 41,172,000 43,557,000 41,095,000 42,855,000 42,773,000 42,224,000 39,520,000 38,292,000 34,177,000 37,415,000 34,789,000 29,961,000 30,073,000 32,494,000 29,475,000 33,614,000 23,098,000 30,855,000 30,345,000 27,342,000 27,476,000 28,051,000 23,495,000 27,446,000 23,506,000 32,611,000 36,879,000 45,590,000 31,849,000 27,695,000 27,607,000 27,607,000 27,069,000 30,855,000 17,036,000 21,998,000 21,998,000 18,481,000 18,663,000 13,046,000 25,187,000 25,187,000 25,449,000 27,908,000 15,864,000 24,040,000 26,641,000 20,078,000 30,611,000 26,455,000 
          deferred income taxes
        337,000,000 224,000,000 170,000,000 319,000,000 185,000,000 205,000,000 180,000,000 230,000,000 180,000,000 134,000,000 285,000,000 118,607,000 116,915,000 117,366,000 110,531,000         103,241,000 96,202,000 97,292,000 75,994,000 96,501,000 102,907,000 86,712,000 74,890,000 251,333,000 95,899,000 37,288,000 53,397,000 53,819,000 52,252,000 51,842,000 53,725,000 13,122,000 40,309,000 47,594,000 36,712,000 60,684,000 38,853,000 40,890,000 16,301,000 43,940,000 39,107,000 361,000 68,107,000 58,741,000 59,485,000 59,761,000 51,411,000 55,727,000 92,457,000 56,460,000 52,044,000 52,044,000 47,306,000 52,203,000 23,252,000 19,542,000 19,542,000 126,514,000 31,334,000 17,241,000 23,624,000 23,624,000 92,307,000 7,510,000 36,012,000 29,362,000 3,098,000 27,188,000 15,232,000 19,499,000 
          other
        24,000,000 9,000,000 14,000,000 30,000,000 40,000,000 -21,000,000 23,000,000 4,000,000 36,000,000 25,000,000 18,000,000 45,876,000 1,330,000 19,995,000 24,589,000 36,612,000 17,642,000 28,165,000 11,672,000 52,926,000 8,345,000 4,436,000 -30,380,000 2,767,000 52,935,000 -1,410,000 -52,725,000 -501,000 -786,000 5,817,000 -7,011,000  -293,000 -90,000 -13,395,000            -1,609,000 -389,000 -1,431,000 -2,227,000 29,752,000 -462,000 52,000 -1,360,000 -211,000 -247,000 -680,000 -333,000 -333,000 300,000 437,000          2,450,000     
          changes in assets and liabilities:
                                                                                      
          accounts receivable
        -100,000,000 169,000,000 -322,000,000 -412,000,000 77,000,000 378,000,000 6,000,000 -46,000,000 -303,000,000 127,000,000 329,000,000 172,939,000 79,516,000 -96,228,000 -243,501,000 76,500,000 -418,490,000 -183,329,000 -85,212,000 -112,926,000 -108,929,000 -113,812,000 334,370,000 -119,938,000 -49,419,000 143,580,000 6,089,000 266,117,000 -150,411,000 -90,446,000 358,733,000 -297,297,000 -156,309,000 -14,501,000 137,586,000 -140,376,000 -59,995,000 -153,761,000 68,326,000 -691,000 98,622,000 -75,180,000 134,300,000 224,958,000 139,051,000 -95,276,000 112,780,000 -372,186,000 -8,256,000 99,680,000 90,953,000 -365,124,000 -190,703,000 360,640,000 180,413,000 -250,492,000 -14,481,000 155,702,000 53,410,000 53,410,000 -474,672,000 35,604,000 295,615,000 235,922,000 235,922,000 -714,376,000 40,509,000 240,461,000 251,980,000 251,980,000         
          inventories, net of commodity imbalances
        -30,000,000 -27,000,000 -113,000,000 -11,000,000 22,000,000 185,000,000 -179,000,000 222,000,000                                                                       
          accounts payable
        56,000,000 20,000,000 281,000,000 359,000,000 13,000,000 -229,000,000 -29,000,000 -100,000,000 481,000,000 -206,000,000 -237,000,000 -322,616,000 -272,195,000 183,623,000 385,082,000 -133,647,000 392,378,000 112,350,000 251,344,000 118,552,000 42,032,000 109,860,000 -350,701,000 99,860,000 105,251,000 -205,588,000 -62,469,000 -278,295,000 240,735,000 78,436,000 -361,008,000 179,131,000 216,508,000 -11,491,000 -122,843,000 149,434,000 34,222,000 168,064,000 -64,088,000 -13,601,000 -55,423,000 -10,221,000 -125,898,000 -306,807,000 -107,760,000 -31,243,000 27,817,000 82,333,000 146,697,000 39,736,000 -103,690,000 125,502,000 247,523,000 -227,332,000 -176,674,000 103,022,000 19,798,000 57,644,000 -77,843,000 -77,843,000 319,402,000 44,228,000 -138,526,000 -268,987,000 -268,987,000 501,413,000 -23,010,000 -13,112,000 -311,252,000 -311,252,000 -129,816,000 -472,298,000 141,735,000 119,795,000     
          other assets and liabilities
        30,000,000 -155,000,000 -156,000,000 312,000,000 -139,000,000 -182,000,000 -156,000,000 156,000,000 87,000,000 -83,000,000 -61,000,000 129,479,000 -75,223,000 21,441,000 -94,233,000 -39,521,000 24,500,000 117,071,000 -56,966,000 -41,237,000 25,476,000 27,483,000 -129,930,000 45,730,000 3,260,000 51,166,000 -114,330,000 27,069,000 4,341,000 25,267,000 -52,072,000 5,858,000 -2,404,000 34,585,000 -53,571,000 17,328,000 24,999,000 21,163,000 -27,219,000 -25,427,000 -7,210,000 28,597,000 -52,067,000 20,349,000 -34,903,000 32,062,000 -1,011,000 -104,378,000 9,099,000 79,022,000 -22,425,000 22,070,000 -24,021,000 -142,954,000 -4,408,000 18,309,000 15,536,000 -113,039,000 67,818,000 67,818,000 -6,905,000 63,498,000 -65,120,000 40,081,000 40,081,000 -51,870,000 -12,751,000 -71,246,000 35,102,000 35,102,000 -63,972,000    155,664,000 -12,224,000   
          cash from operating activities
        1,624,000,000 1,525,000,000 904,000,000 1,611,000,000 1,251,000,000 1,430,000,000 596,000,000 1,508,000,000 920,000,000 772,000,000 1,221,000,000 1,040,449,000 615,922,000 787,373,000 462,211,000 1,055,110,000 413,179,000 544,666,000 533,317,000 795,940,000 366,710,000 313,697,000 422,721,000 619,934,000 358,894,000 614,345,000 353,606,000 670,269,000 513,480,000 507,649,000 495,321,000 379,416,000 293,105,000 373,801,000 269,090,000 429,586,000 390,422,000 302,128,000 229,478,000 311,903,000 361,157,000 294,650,000 39,270,000 415,071,000 334,232,000 45,924,000 490,383,000 273,221,000 233,265,000 316,783,000 471,498,000 228,084,000 110,249,000 226,525,000 426,085,000 330,353,000 154,020,000 227,818,000 647,781,000 647,781,000 74,011,000 168,904,000  558,717,000      790,858,000  -56,407,000 -335,710,000 870,515,000 88,204,000 -21,932,000 89,173,000 874,215,000 
          investing activities
                                                                                      
          capital expenditures
        -804,000,000 -749,000,000 -629,000,000 -562,000,000 -468,000,000 -479,000,000 -512,000,000 -603,000,000 -398,000,000 -305,000,000 -289,000,000 -316,016,000 -326,731,000 -302,332,000 -256,978,000 -206,525,000 -166,207,000 -147,388,000 -176,734,000 -271,378,000 -380,042,000 -594,282,000 -949,679,000 -1,109,011,000 -1,019,174,000 -830,459,000 -889,705,000 -831,820,000 -694,303,000 -350,885,000 -264,467,000 -181,962,000 -135,199,000 -82,495,000 -112,737,000 -133,106,000 -158,274,000 -136,843,000 -196,411,000 -257,996,000 -300,868,000 -285,601,000 -343,847,000 -574,764,000 -382,185,000 -392,676,000 -429,525,000 -658,765,000 -537,487,000 -559,268,000 -501,065,000 -627,245,000 -458,211,000 -432,260,000 -348,437,000 -473,757,000 -338,538,000 -329,093,000 -194,679,000 -194,679,000 -226,459,000 -176,585,000  -68,273,000      -243,027,000  -364,808,000 -241,884,000 
          free cash flows
        820,000,000 776,000,000 275,000,000 1,049,000,000 783,000,000 951,000,000 84,000,000 905,000,000 522,000,000 467,000,000 932,000,000 724,433,000 289,191,000 485,041,000 205,233,000 848,585,000 246,972,000 397,278,000 356,583,000 524,562,000 -13,332,000 -280,585,000 -526,958,000 -489,077,000 -660,280,000 -216,114,000 -536,099,000 -161,551,000 -180,823,000 156,764,000 230,854,000 197,454,000 157,906,000 291,306,000 156,353,000 296,480,000 232,148,000 165,285,000 33,067,000 53,907,000 60,289,000 9,049,000 -304,577,000 -159,693,000 -47,953,000 -346,752,000 60,858,000 -385,544,000 -304,222,000 -242,485,000 -29,567,000 -399,161,000 -347,962,000 -205,735,000 77,648,000 -143,404,000 -184,518,000 -101,275,000 453,102,000 453,102,000 -152,448,000 -7,681,000  490,444,000      547,831,000  -56,407,000 -335,710,000 870,515,000 -276,604,000 -263,816,000 89,173,000 874,215,000 
          cash paid for acquisitions, net of cash received
            -51,000,000                                                                          
          purchases of and contributions to unconsolidated affiliates
        -344,000,000 -73,000,000 -82,000,000 -9,000,000 -4,000,000 -6,000,000 -92,000,000                                                                        
          cash from investing activities
        -1,134,000,000 -814,000,000 -694,000,000 -4,780,000,000 -498,000,000 -756,000,000 -578,000,000 -645,000,000 -5,406,000,000 -400,000,000 47,000,000 -275,380,000 -321,069,000 -299,082,000 -243,705,000 -189,865,000 -150,862,000 -153,874,000 -170,691,000 -288,658,000 -426,985,000 -590,094,000 -964,792,000 -1,120,884,000 -1,015,813,000 -767,232,000 -864,829,000 -630,068,000 -883,419,000 -345,749,000 -255,652,000 -173,036,000 -210,866,000 -74,268,000 -109,463,000 -130,857,000 -186,109,000 -128,532,000 -169,947,000 -248,538,000 -286,409,000 -321,997,000 -333,775,000 -1,374,087,000 -371,640,000 -381,162,000 -439,334,000 -761,340,000 -837,091,000 -548,793,000 -494,807,000 -615,615,000 -460,133,000 -424,052,000 -314,399,000 -474,739,000 -387,998,000 -319,404,000 -189,485,000 -189,485,000 -213,804,000 249,333,000  -66,376,000      -238,582,000     -662,467,000 -213,504,000   
          financing activities
                                                                                      
          dividends paid
        -648,000,000 -644,000,000 -643,000,000 -579,000,000 -578,000,000 -578,000,000 -578,000,000 -556,000,000 -428,000,000 -428,000,000 -427,000,000 -418,180,000 -418,093,000 -417,892,000 -417,417,000 -417,227,000 -417,121,000 -416,854,000 -416,229,000 -415,791,000 -415,614,000 -387,294,000 -386,667,000 -378,249,000 -367,845,000 -357,331,000 -354,203,000 -351,990,000 -339,575,000 -327,085,000 -316,408,000 -285,969,000 -283,687,000 -129,916,000 -129,842,000 -129,498,000 -129,595,000 -129,273,000 -129,235,000 -128,699,000 -128,082,000 -126,363,000 -126,053,000 -122,766,000 -121,367,000 -116,409,000 -83,275,000 -78,393,000 -78,367,000 -74,201,000 -73,781,000 -67,526,000 -67,671,000 -63,397,000 -63,375,000 -57,683,000 -57,981,000 -55,705,000 -55,651,000 -55,651,000 -51,116,000 -48,954,000 -46,771,000 -46,701,000 -46,701,000 -44,307,000 -44,265,000 -42,122,000 -42,080,000 -42,080,000 -41,799,000    -37,346,000 -37,398,000   
          issuance of long-term debt, net of discounts
           112,000,000    5,238,000,000 10,000,000 50,000,000         1,496,556,000 1,748,221,000 1,992,653,000 750,000,000 1,442,782,000 550,000,000    429,000    1,000,000,000 492,610,000 798,896,000                                    
          debt financing costs
                         77,000 -12,880,000 -15,444,000 30,000 -17,863,000 -251,000 -11,663,000 -2,140,000    -85,000 -11,302,000   -2,770,000 -389,000 -9,276,000 -7,850,000                                    
          repurchase of common stock
        -30,000,000                                                   -3,000 -300,057,000 -48,000 -48,000 -2,000 -5,000 -5,000 -2,000 -2,000 -3,000 -247,000 -247,000    -20,000 -41,000   
          delaware basin jv acquisition
        -14,000,000                                                                              
          repayment of long-term debt
        -482,000,000 -553,000,000 -250,000,000 -1,519,000,000    -260,000,000 -100,000,000 -515,000,000 -425,000,000    -536,107,000 -12,295,000 -56,492,000 -23,742,000 -27,361,000 -1,353,730,000 -52,389,000 -1,912,000 -551,611,000 -1,912,000 -501,913,000 -1,912,000 -426,913,000 -1,912,000 -501,913,000 -1,912,000 -988,966,000 -1,947,000 -1,951,000 -451,923,000 -1,966,000 -2,003,000 -652,148,000 -1,958,000 -1,920,000 -1,927,000 -1,948,000 -1,911,000                                   
          cash from financing activities
        612,000,000 -755,000,000 -802,000,000 -2,562,000,000 5,675,000,000 -703,000,000 -291,000,000 -809,000,000 4,664,000,000 -946,000,000 -808,000,000 -567,057,000 -408,412,000 -367,127,000 -350,287,000 -943,191,000 -412,357,000 -418,828,000 -484,709,000 -429,915,000 -438,328,000 690,499,000 1,052,743,000 -151,401,000 1,056,831,000 398,470,000 527,062,000 -112,690,000 439,108,000 -164,079,000 -259,388,000 -180,863,000 -402,934,000 -277,970,000 -97,694,000 -287,371,000 -147,801,000 -129,678,000 -19,942,000 -4,126,000 -262,136,000 13,900,000 360,951,000 980,227,000 -169,647,000 484,054,000 9,865,000 -142,092,000 1,349,669,000 121,744,000 -416,362,000 -7,676,000 1,213,789,000 -468,745,000 594,694,000 70,791,000 -95,188,000 -300,927,000 380,756,000 380,756,000 120,344,000 -471,005,000  -354,307,000  -38,303,000 51,438,000   -985,581,000 878,152,000 425,466,000   -240,377,000 765,893,000   
          change in cash and cash equivalents
        1,102,000,000 -44,000,000 -592,000,000 -5,731,000,000 6,428,000,000 -29,000,000 -273,000,000 54,000,000 178,000,000 -574,000,000 460,000,000 198,012,000 -113,559,000 121,164,000 -131,781,000 -77,946,000 -150,040,000 -28,036,000 -122,083,000 77,367,000 -498,603,000 414,102,000 510,672,000 -652,351,000 399,912,000 245,583,000 15,839,000 -72,489,000 69,169,000 -2,179,000 -19,719,000 25,517,000 -320,695,000 21,563,000 61,933,000 11,358,000 56,512,000 43,918,000 39,589,000 59,239,000 -187,388,000 -13,447,000 66,446,000 21,211,000 -207,055,000 148,816,000 60,914,000 -630,211,000 745,843,000 -110,266,000 -439,671,000 -395,207,000 863,905,000 -666,272,000 706,380,000 -73,595,000 -329,166,000 -392,513,000 839,052,000 839,052,000 -19,449,000 -52,768,000 -64,182,000 138,034,000 138,034,000 -22,781,000 5,142,000 -29,715,000 -433,305,000 -433,305,000 437,114,000 -25,800,000 -169,996,000 249,635,000 -814,640,000 530,457,000 77,778,000 157,242,000 
          cash and cash equivalents at beginning of period
        733,000,000 338,000,000 220,000,000 146,391,000 524,496,000 20,958,000 11,975,000 37,193,000 248,875,000 97,619,000 172,812,000 145,565,000 583,618,000 65,953,000 -693,000 31,034,000 31,034,000 29,399,000 29,399,000 510,058,000 510,058,000 19,105,000 68,268,000 
          cash and cash equivalents at end of period
        1,102,000,000 -44,000,000 141,000,000 -5,731,000,000 6,428,000,000 -29,000,000 65,000,000 54,000,000 178,000,000 -574,000,000 680,000,000 198,012,000 -113,559,000 121,164,000 14,610,000 -77,946,000 -150,040,000 -28,036,000 402,413,000 77,367,000 -498,603,000 414,102,000 531,630,000 -652,351,000 399,912,000 245,583,000 27,814,000 -72,489,000 69,169,000 -2,179,000 17,474,000 25,517,000 -320,695,000 21,563,000 310,808,000 11,465,000 56,556,000 43,635,000 137,219,000 59,248,000 -187,822,000 -13,218,000 239,411,000 21,409,000 -207,157,000 148,333,000 210,227,000 -630,211,000 745,843,000 -110,266,000 143,947,000 -395,207,000 863,905,000 -666,272,000 781,192,000 -82,454,000 -329,166,000 -392,513,000 870,086,000 870,086,000 -19,449,000 -52,768,000 -64,182,000 167,433,000 167,433,000 -22,781,000 5,142,000 -29,715,000 76,753,000 76,753,000 437,114,000 -25,800,000 -169,996,000 268,740,000 -814,640,000 530,457,000 77,778,000 225,510,000 
          risk-management assets and liabilities
         48,000,000 -34,000,000   51,000,000 -144,000,000   21,000,000 26,000,000 150,451,000 177,882,000 -12,170,000 -118,703,000 160,450,000 -95,236,000 -139,625,000 -19,302,000 -50,915,000 3,181,000 -60,868,000 -78,856,000 6,976,000 -99,647,000 2,041,000 4,362,000 50,751,000 -5,614,000 38,193,000 34,387,000 3,083,000 -32,406,000 20,963,000 45,977,000 -29,441,000 11,321,000 -36,203,000 -23,813,000                                        
          short-term borrowings
         1,005,000,000 200,000,000   -140,000,000 320,000,000        78,000,000                                                                
          gain on sale of business
                                                                                      
          medford settlement gain
               -779,000,000                                                                    
          medford settlement proceeds
               502,000,000                                                                    
          cash paid for acquisitions, net of cash acquired
                                                                                      
          proceeds from the sale of business
                                                                                      
          distributions received from unconsolidated affiliates in excess of cumulative earnings
           -3,000,000 24,000,000 6,000,000 25,000,000 32,000,000 2,000,000 8,000,000 8,000,000 2,253,000 4,639,000 3,580,000 9,795,000 175,000 7,493,000 1,504,000 10,191,000 9,528,000 4,199,000 11,132,000 6,949,000 11,997,000 4,922,000 63,722,000 13,527,000 7,144,000 6,025,000 4,867,000 8,721,000 7,165,000 6,641,000 7,536,000 7,400,000 9,026,000 6,645,000 24,609,000 11,764,000  6,297,000 8,860,000 9,954,000                                    
          repurchase of enlink’s series c preferred units
                                                                                      
          supplemental cash flow information:
                                                                                      
          cash paid for interest, net of amounts capitalized
                                                                                      
          cash paid for income taxes, net of refunds
                                                                                      
          cash paid for magellan acquisition, net of cash acquired
               -7,000,000                                                                       
          contributions to unconsolidated affiliates
               -96,000,000 -3,000,000               -738,000 -1,921,000 -353,000 -1,016,000 -917,000 -537,000 -147,000 -147,000 -208,000 -83,000,000 -231,000 -4,422,000 -13,098,000 -35,347,000 -19,672,000 -158,000 5,682,000   -436,000 -627,000 -30,750,000 -1,522,000 -3,036,000 -9,484,000 -14,047,000 -4,660,000 -2,577,000 -12,805,000 -50,031,000 -1,405,000 -250,000 -250,000 -18,000                  
          ngls and natural gas in storage, net of commodity imbalances
                 20,000,000 20,000,000 102,884,000 -143,000 -118,102,000 -46,788,000                                                                
          accrued interest
                  -96,000,000    -99,154,000    -104,872,000 104,647,000 -76,870,000 95,544,000 -68,918,000 68,687,000   -47,810,000    -37,784,000 38,286,000 -14,674,000 21,546,000 -22,363,000 8,377,000 -15,637,000 15,144,000 -24,413,000 20,589,000     -2,261,000 2,268,000 -6,397,000                 43,133,000 43,133,000 -43,447,000   38,623,000 38,623,000 -32,734,000   50,293,000     
          impairment charges
                           3,176,000 641,754,000                                                       
          borrowing (repayment) of short-term borrowings
                                   -120,000,000 -36,000,000 156,000,000 -614,673,000 -317,577,000 -342,157,000 -16,322,000 180,452,000 416,777,000 117,193,000 131,740,000 -101,773,000                                        
          issuance of common stock
                       10,920,000 5,544,000   10,106,000 5,230,000   9,707,000 5,175,000 9,374,000 4,784,000 8,853,000 8,410,000 4,601,000 1,182,117,000 425,509,000 35,004,000 7,123,000 3,722,000 7,023,000 3,847,000 7,137,000 3,964,000 6,830,000 3,541,000 6,502,000 3,796,000 6,242,000 3,742,000 6,146,000 3,020,000 12,064,000 2,536,000 3,171,000 2,831,000 8,901,000 2,477,000 2,363,000 2,228,000 10,764,000 2,222,000 -104,000 5,024,000 5,024,000 11,555,000 1,473,000 3,221,000 4,663,000 4,663,000 10,578,000 2,397,000 1,833,000 2,509,000 2,509,000 9,246,000 1,463,000 4,253,000 1,533,000 9,388,000 2,923,000 5,739,000 2,680,000 
          issuance of long-term debt
                                                                                     
          deferred income tax expense
                       127,249,000 117,845,000 107,769,000 119,194,000 93,556,000 106,715,000 42,408,000 -55,949,000                                                        
          ngls and natural gas in storage
                        -173,350,000 -85,156,000 -141,794,000 72,767,000 -98,694,000 -70,842,000 173,885,000                                                        
          repayment of short-term borrowings
                            -220,000,000                                                        
          commodity imbalances
                          18,415,000     -4,645,000 9,638,000 -7,576,000 649,000 -59,681,000 31,252,000 23,882,000 -39,755,000 47,703,000 2,130,000 -8,022,000 1,888,000 -9,138,000 23,644,000 28,497,000 2,968,000 -29,811,000 5,231,000 5,440,000 15,057,000 -57,140,000 -17,384,000 -19,385,000 3,555,000 -2,959,000 8,611,000 -1,584,000 -56,301,000 26,161,000 -7,735,000 126,649,000 -101,604,000 8,273,000 -50,707,000 5,640,000 -18,092,000 -18,092,000   -15,375,000 -58,903,000 -58,903,000              
          distributions to noncontrolling interests
                                   -500,000 -1,500,000 -1,500,000 -1,200,000 -1,600,000 -136,780,000 -136,680,000 -136,880,000 -137,280,000 -137,279,000 -137,980,000 -138,978,000 -136,359,000 -131,031,000 -129,457,000 -122,301,000 -118,816,000 -104,687,000 -101,655,000 -100,796,000 -91,824,000 -91,186,000 -90,336,000 -87,162,000 -84,156,000 -80,736,000 -72,852,000 -71,115,000 -69,704,000 -68,515,000 -68,041,000 -68,041,000 -67,496,000 -66,801,000 -66,306,000 -59,782,000 -59,782,000 -58,972,000 -58,431,000 -52,556,000 -52,751,000 -52,751,000         
          acquisition of noncontrolling interests
                                                                                      
          noncash contribution of preferred stock, net of tax
                                                                                    
          share-based compensation expense
                               9,109,000 9,974,000 9,457,000 8,607,000 7,701,000 7,892,000 8,868,000 7,203,000 6,574,000 6,211,000 7,570,000 5,907,000 9,451,000 7,918,000 14,962,000 8,232,000 2,703,000 5,848,000 2,241,000 5,643,000 2,867,000 6,071,000 12,838,000 4,450,000 18,560,000 8,616,000 2,262,000 16,756,000 722,000 19,042,000 11,920,000 5,008,000 27,074,000 9,682,000 21,713,000 7,902,000 7,902,000 8,423,000 5,744,000 5,639,000 4,566,000 4,566,000              
          allowance for equity funds used during construction
                               -19,640,000 -15,792,000 -16,942,000 -12,441,000 -4,634,000 -2,294,000 -804,000 -230,000 -32,000 -40,000 -22,000 -13,000 -1,000 -208,000 -461,000 -177,000 -742,000 -799,000 -990,000 -1,723,000 -1,253,000 -10,971,000 -9,350,000 -6,429,000 -5,656,000 -9,087,000 -7,522,000 -3,302,000 -1,849,000 -975,000 -710,000 -759,000 -400,000 -466,000 -466,000 -270,000 -266,000 -235,000 -247,000 -247,000 -1,107,000 -7,290,000 -9,468,000 -9,003,000 -9,003,000 -15,118,000        
          natural gas and ngls in storage
                               -21,381,000 -98,595,000                                                      
          proceeds from sale of assets and other
                                360,000                                                      
          pension and postretirement benefit expense, net of contributions
                                 3,260,000 -12,250,000 3,371,000 2,194,000 3,297,000 -8,393,000 3,261,000 2,394,000 3,442,000 -5,018,000 3,373,000 2,098,000 3,133,000 3,039,000 4,669,000 2,773,000 3,062,000 4,310,000 3,811,000 1,553,000 4,227,000 8,502,000                                
          loss on sale of assets
                                      -89,000    7,000    -4,206,000  726,000 -122,000 6,000 -5,066,000 -1,534,000       -6,133,000 420,000 -966,000 -57,000 172,000 69,000 212,000 510,000 510,000                   
          gain on sale of assets
                                  -60,000 -253,000 -163,000   -20,000 -274,000              -15,000  -22,000 -279,000 -41,000          -3,551,000 -16,126,000  786,000  -1,560,000 1,180,000 -3,762,000 -664,000 -664,000 -997,000    -16,000 -59,000   
          natural gas and natural gas liquids in storage
                                  53,444,000 129,626,000 -140,517,000 -100,478,000 149,825,000 -28,027,000 -114,133,000 -6,794,000 -53,305,000 77,735,000 28,177,000 -89,871,000 -27,991,000 14,224,000 7,829,000 68,554,000 -84,557,000 204,211,000 -3,229,000 -103,966,000 63,844,000                                
          proceeds from sale of assets
                                  12,365,000 525,000 396,000 416,000 241,000 1,969,000 692,000 922,000 296,000 6,321,000 867,000 3,374,000 14,858,000 654,000 2,480,000 573,000 118,000 5,429,000 2,069,000 226,000 93,000 11,932,000 -1,648,000 737,000 2,596,000 10,322,000 90,000 1,307,000 521,000 337,000 163,000 248,000 540,000 540,000 4,168,000 424,369,000 -192,000 563,000 563,000 475,000 478,000 8,946,000 1,083,000 1,083,000 856,000 1,573,000 40,000 161,000 23,000 236,000 56,000 3,707,000 
          cash paid for income taxes
                                                                                      
          cash paid for acquisition
                                                                                      
          settlement of exit activities liabilities
                                      -1,580,000 -1,580,000 -1,581,000 -2,427,000 -4,119,000 -3,695,000 -4,621,000 -5,404,000 -6,186,000 -7,329,000 -8,822,000 -9,617,000 -12,768,000 -13,130,000 -12,899,000 -13,552,000 -12,176,000                                
          issuance of common units, net of issuance costs
                                               100,562,000 221,710,000 53,388,000 165,667,000 68,707,000 825,926,000 52,839,000 14,683,000 553,304,000 3,123,000 12,819,000 -93,000                          
          change in cash and cash equivalents included in discontinued operations
                                           107,000 44,000 -283,000 11,000 9,000 -434,000 229,000 153,000 198,000 -102,000 -483,000 3,748,000     8,859,000                        
          change in cash and cash equivalents from continuing operations
                                       25,517,000 -320,695,000 21,563,000 61,933,000 11,465,000 56,556,000 43,635,000 39,600,000         -630,211,000 745,843,000 -110,266,000 -439,671,000 -395,207,000 863,905,000 -666,272,000 715,239,000                        
          changes in assets and liabilities, net of acquisitions:
                                                                                      
          issuance of one gas debt, net of discounts
                                                                                      
          one gas long-term debt financing costs
                                                                                      
          cash of one gas at separation
                                                                                      
          cash paid (refunds received) for income taxes
                                                                                      
          charges attributable to exit activities
                                                   1,739,000                                
          energy marketing and risk-management assets and liabilities
                                                        12,645,000                              
          excess tax benefit from share-based awards
                                                                                      
          energy marketing and risk management assets and liabilities
                                                20,908,000 -5,277,000 -60,871,000        21,346,000 30,055,000 -148,418,000 66,310,000 -122,900,000 -19,294,000 -8,268,000 8,246,000 -12,683,000 -12,683,000 -5,492,000 54,269,000 39,528,000 24,522,000 24,522,000 29,161,000 49,006,000 68,294,000 -32,921,000 -32,921,000 10,942,000 -11,073,000 57,602,000 3,375,000 -56,871,000 -13,527,000 -51,274,000 61,128,000 
          cash paid for acquisitions
                                                                                      
          borrowing (repayment) of notes payable
                                                -583,212,000 45,009,000 -229,821,000 1,055,296,000       140,423,000 80,816,000 176,174,000 -422,225,000 191,982,000 123,367,000 526,633,000 -556,855,000 -556,855,000 230,470,000     57,870,000 134,090,000 103,210,000 -813,300,000 -813,300,000   535,893,000 63,000,000     
          change in cash and cash equivalents included in continuing operations
                                                -187,822,000 -13,218,000 66,599,000  -207,157,000 148,333,000 64,662,000                                
          impairment of goodwill
                                                           10,255,000                        
          gain on sale of discontinued operations
                                                           -267,000 -13,250,000                        
          equity earnings from investments
                                                   -34,256,000 52,347,000 -25,435,000 -33,659,000 -30,773,000 -27,468,000 -26,421,000 -25,855,000 -30,644,000 -28,591,000 -29,169,000 -34,620,000 -33,581,000 -32,029,000 -29,544,000 -32,092,000 -32,092,000 -30,698,000 -29,390,000 -20,676,000 -21,116,000 -21,116,000 -17,258,000 -20,054,000 -14,188,000 -21,222,000 -21,222,000 -26,627,000        
          proceeds from sale of discontinued operations, net of cash sold
                                                           938,000 32,008,000                        
          long-term debt financing costs
                                                       -29,000    -6,000 -9,635,000 -3,000 -5,392,000 -10,986,000 -10,986,000      -4,000,000 -4,000,000         
          accrued taxes other than income
                                                                                      
          acquisitions
                                                                                      
          issuance of one gas, inc. debt, net of discounts
                                                    1,199,994,000                                
          one gas, inc. long-term debt financing costs
                                                    -9,663,000                                
          cash of one gas, inc. at separation
                                                    -60,000,000                                
          acquisition
                                                     -14,000,000                                
          repayment of debt
                                                     -1,922,000 -551,933,000 -2,066,000 -1,914,000 -1,913,000 -1,975,000 -2,213,000 -3,078,000 -353,091,000 -3,082,000        -253,210,000 -3,333,000 -3,333,000              
          repayment of notes payable
                                                      -439,462,000    -265,920,000            370,000,000 -571,870,000 -571,870,000              
          charges attributable to exit activities, net of settlements
                                                       -2,639,000                               
          gas and natural gas liquids in storage
                                                       247,136,000 -229,217,000 -132,523,000 214,541,000 127,705,000 -82,917,000 -262,672,000 251,227,000 38,870,000 -107,785,000 -166,502,000 301,262,000 301,262,000 -5,849,000 -160,491,000 -175,687,000 177,305,000 177,305,000 74,276,000 -92,873,000 -119,145,000 404,416,000 404,416,000 111,698,000   488,214,000     
          issuance of debt, net of discounts
                                                          1,295,036,000 699,657,000 1,295,450,000 1,295,450,000      498,325,000 498,325,000         
          reclassified loss on energy price risk-management assets and liabilities
                                                                                      
          borrowing of notes payable
                                                                                      
          fair value of firm commitments
                                                               -4,048,000 -9,881,000    -13,509,000 -22,607,000 -45,945,000 -23,023,000 -23,023,000 -21,717,000 18,934,000 26,191,000 153,391,000 153,391,000 136,331,000        
          pension and postretirement benefits
                                                                                      
          see accompanying notes to consolidated financial statements.
                                                                                      
          reclassified loss on energy price risk management assets and liabilities
                                                            29,861,000                        
          issuance of common units
                                                              459,735,000                        
          repayment of notes payable with maturities over 90 days
                                                                          -400,000,000 -470,000,000 -470,000,000         
          payment of debt
                                                               -3,157,000 -93,089,000 -403,179,000 -228,137,000 -228,137,000 -3,067,000     -3,469,000 -3,536,000 -3,933,000 -104,037,000 -104,037,000 -3,821,000    -3,185,000 -6,516,000   
          issuance of common units, net of discounts
                                                                             6,600,000 140,369,000     
          unrecovered purchased gas costs
                                                                -28,080,000      -9,757,000 98,783,000 98,783,000 12,000,000 -31,522,000 321,000 42,445,000 42,445,000 16,169,000    -1,697,000 -30,970,000 22,286,000 19,911,000 
          borrowing (repayment) of notes payable with maturities over 90 days
                                                                                      
          other financing activities
                                                                                  5,420,000    
          commodity exchange imbalances
                                                                                      
          changes in investments in unconsolidated affiliates
                                                                      8,114,000 1,334,000 1,334,000 7,847,000 -37,271,000 14,031,000 3,362,000 3,362,000 900,000 -3,417,000 3,169,000 3,311,000 1,878,000 2,107,000   
          issuance of common units of oneok partners, net of discounts
                                                                      -17,000 322,721,000 322,721,000              
          loss (gain) on sale of assets
                                                                        786,000              
          cash provided by operating activities
                                                                        558,717,000    790,858,000          
          cash used in investing activities
                                                                        -66,376,000    -238,582,000          
          cash used in financing activities
                                                                        -354,307,000    -985,581,000          
          allowance for doubtful accounts
                                                                       -221,000 -221,000 1,170,000 1,399,000 2,485,000 -822,000 -822,000 1,808,000 4,703,000 4,930,000 2,035,000 2,004,000 4,273,000 6,327,000 1,974,000 
          inventory adjustment
                                                                              -1,000        
          investment securities gains
                                                                         -655,000            
          proceeds from insurance
                                                                         1,931,000           
          changes in short-term investments
                                                                                  26,037,000   
          issuance of common units to noncontrolling interests, net of discounts
                                                                         -1,000             
          stock-based compensation expense
                                                                          6,682,000 4,378,000 4,173,000 4,173,000 4,015,000 12,360,000 6,434,000 7,982,000 -5,840,000 5,197,000 7,070,000 8,212,000 
          commodity exchanges and imbalances
                                                                          7,964,000 32,965,000 -51,317,000 -51,317,000 -34,238,000 -57,018,000   21,261,000 4,285,000   
          changes in assets and liabilities
                                                                                      
          deposits
                                                                            3,443,000 3,443,000     -442,000 36,003,000 -37,677,000 79,641,000 
          minority interests in income of consolidated subsidiaries
                                                                              53,147,000 95,354,000 71,097,000 68,960,000 58,186,000 44,998,000 44,702,000 45,313,000 
          accounts and notes receivable
                                                                                  -791,347,000 101,250,000 251,149,000 60,072,000 
          pension and postretirement benefit plans
                                                                                      
          proceeds from sale of discontinued component
                                                                                      
          increase in cash and cash equivalents attributable to previously unconsolidated subsidiaries
                                                                                      
          decrease in cash and cash equivalents attributable to previously consolidated subsidiaries
                                                                                      
          other investing activities
                                                                                      
          issuance of debt, net of issuance costs
                                                                                      
          equity unit conversion
                                                                                      
          distributions to minority interests
                                                                              -52,485,000    -46,429,000 -45,971,000   
          effect of accounting change on cash and cash equivalents
                                                                                      
          cash paid for interest
                                                                                      
          cash paid for taxes
                                                                                      
          trade accounts and notes receivable
                                                                               440,215,000       
          borrowing (payment) of notes payable
                                                                                      
          allowance for funds used during construction
                                                                                      
          impairment expense on discontinued operations
                                                                                      
          gain on sale of discontinued component
                                                                                      
          income from equity investments
                                                                                  -24,933,000 -22,162,000   
          inventories
                                                                                  137,968,000 -184,746,000 -289,641,000 425,279,000 
          regulatory assets
                                                                                  -6,156,000 6,491,000   
          accounts payable and accrued liabilities
                                                                                  405,498,000 -62,991,000 -31,810,000 42,407,000 
          short-term financing payments
                                                                                   -445,000,000   
          short-term financing borrowings
                                                                                   705,000,000   
          depreciation, depletion and amortization
                                                                                      
          depreciation, depletion, and amortization
                                                                                     56,450,000 
          purchase of short-term investments
                                                                                      
          increase in cash and cash equivalents for previously unconsolidated subsidiaries
                                                                                      
          decrease in cash and cash equivalents for previously consolidated subsidiaries