7Baggers

Transocean Quarterly Balance Sheets Chart

Quarterly
 | 
Annual
 
 Account Receivables  
 Cash and Cash Eq  
 Account Payables  
 Long-Term Debt  
20200930 20201231 20210331 20210630 20210930 20211231 20220331 20220630 20220930 20221231 20230331 20230630 20230930 20231231 20240331 20240630 20240930 20241231 20250331 20250630 01.112.233.344.455.576.687.79Billion

Transocean Quarterly Balance Sheets Table

Quarterly
 | 
Annual
 
Unit: USD2025-06-30 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 2017-09-30 2017-06-30 2016-12-31 2016-09-30 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 2012-06-30 2011-12-31 2011-09-30 2011-06-30 2011-03-31 2010-12-31 2010-09-30 2010-06-30 2010-03-31 2009-12-31 2009-09-30 2009-06-30 2009-03-31 2008-12-31 
                                                               
  assets                                                             
  cash and cash equivalents377,000,000 263,000,000 560,000,000 435,000,000 475,000,000 446,000,000 762,000,000 594,000,000 821,000,000 747,000,000 683,000,000 954,000,000 729,000,000 911,000,000 976,000,000 900,000,000 988,000,000 1,066,000,000 1,154,000,000 1,382,000,000 1,511,000,000 1,483,000,000 1,790,000,000 1,906,000,000 2,243,000,000 1,886,000,000 2,160,000,000 2,307,000,000 2,506,000,000 2,712,000,000 2,717,000,000 2,471,000,000 3,052,000,000 2,534,000,000 2,574,000,000 2,339,000,000 2,234,000,000 3,769,000,000 2,682,000,000 2,635,000,000 2,873,000,000 2,117,000,000 1,987,000,000 3,243,000,000 3,559,000,000 3,357,000,000 3,689,000,000 3,964,000,000 4,017,000,000 3,286,000,000 3,389,000,000 3,812,000,000 3,394,000,000 4,636,000,000 2,888,000,000 1,586,000,000 1,130,000,000 886,000,000 907,000,000 1,302,000,000 963,000,000 
  accounts receivable577,000,000 551,000,000 564,000,000 594,000,000 607,000,000 585,000,000 512,000,000 532,000,000 523,000,000 499,000,000 485,000,000 599,000,000 610,000,000 525,000,000 492,000,000 507,000,000 539,000,000 511,000,000 583,000,000 699,000,000 703,000,000 654,000,000 654,000,000    604,000,000  619,000,000 576,000,000 663,000,000 624,000,000  887,000,000 1,094,000,000  1,482,000,000 1,806,000,000 1,964,000,000  2,174,000,000 2,214,000,000 2,217,000,000  2,367,000,000 2,105,000,000 2,117,000,000 2,124,000,000  2,046,000,000 2,114,000,000 2,161,000,000  2,299,000,000 2,254,000,000 2,285,000,000  2,614,000,000 2,674,000,000 2,884,000,000  
  materials and supplies, net of allowance of 167 and 178 at june 30, 2025 and december 31, 2024, respectively427,000,000                                                             
  assets held for sale43,000,000 344,000,000 343,000,000 345,000,000                              6,000,000 8,000,000 8,000,000 9,000,000 9,000,000 23,000,000 25,000,000 50,000,000 150,000,000 160,000,000 148,000,000 131,000,000 143,000,000 128,000,000 9,000,000 26,000,000 118,000,000 139,000,000 77,000,000     186,000,000 186,000,000 186,000,000 244,000,000 464,000,000 
  restricted cash and cash equivalents395,000,000 428,000,000 381,000,000 365,000,000 400,000,000 270,000,000 233,000,000 214,000,000 213,000,000 208,000,000 308,000,000 387,000,000 432,000,000 315,000,000 436,000,000 576,000,000 502,000,000 388,000,000 406,000,000                                           
  other current assets181,000,000 165,000,000 165,000,000 179,000,000 213,000,000 133,000,000 193,000,000 217,000,000 281,000,000 187,000,000 144,000,000 131,000,000 126,000,000 142,000,000 148,000,000 165,000,000 156,000,000 161,000,000 163,000,000 187,000,000 176,000,000 164,000,000 159,000,000 200,000,000 222,000,000 170,000,000 159,000,000 169,000,000 188,000,000 164,000,000 154,000,000 137,000,000 121,000,000 113,000,000 61,000,000 84,000,000 386,000,000 214,000,000 210,000,000 242,000,000 275,000,000 299,000,000 346,000,000 325,000,000 414,000,000 414,000,000 400,000,000 452,000,000 621,000,000 421,000,000 438,000,000 197,000,000 169,000,000 234,000,000 184,000,000 263,000,000 171,000,000 193,000,000 192,000,000 165,000,000 230,000,000 
  total current assets2,000,000,000 2,204,000,000 2,452,000,000 2,343,000,000 2,135,000,000 1,871,000,000 2,126,000,000 1,967,000,000 2,235,000,000 2,031,000,000 2,008,000,000 2,469,000,000 2,286,000,000 2,279,000,000 2,444,000,000 2,581,000,000 2,618,000,000 2,559,000,000 2,740,000,000 3,175,000,000 3,284,000,000 3,291,000,000 3,640,000,000 3,771,000,000 4,208,000,000 3,792,000,000 3,948,000,000 4,065,000,000 4,217,000,000 4,543,000,000 4,451,000,000 4,286,000,000 5,098,000,000 4,491,000,000 4,700,000,000 4,785,000,000 4,906,000,000 6,719,000,000 5,843,000,000 6,001,000,000 6,367,000,000 5,760,000,000 5,633,000,000 6,772,000,000 7,373,000,000 6,866,000,000 7,133,000,000 7,367,000,000 7,609,000,000 6,569,000,000 6,738,000,000 6,904,000,000 6,195,000,000 7,770,000,000 5,914,000,000 4,711,000,000 4,476,000,000 4,603,000,000 4,630,000,000 5,215,000,000 5,349,000,000 
  ​                                                             
  property and equipment20,957,000,000 22,460,000,000 22,417,000,000 22,412,000,000 24,066,000,000 23,948,000,000 23,875,000,000 23,674,000,000 23,527,000,000 23,996,000,000 24,217,000,000 23,728,000,000 23,633,000,000 23,245,000,000 23,152,000,000 23,102,000,000 23,054,000,000 23,020,000,000 23,040,000,000 23,038,000,000 23,318,000,000 23,935,000,000 24,281,000,000 24,203,000,000 25,220,000,000 25,118,000,000 25,811,000,000 23,565,000,000 24,236,000,000 25,165,000,000 22,599,000,000 24,717,000,000 27,372,000,000 27,178,000,000 26,557,000,000 26,274,000,000 25,612,000,000 24,708,000,000 26,740,000,000 28,516,000,000 30,107,000,000 30,550,000,000 30,250,000,000 28,443,000,000 27,707,000,000 27,525,000,000 27,404,000,000 30,559,000,000 29,037,000,000 26,886,000,000 26,897,000,000 26,819,000,000 27,007,000,000 27,644,000,000 27,377,000,000 27,604,000,000 29,351,000,000 28,513,000,000 27,275,000,000 26,373,000,000 25,802,000,000 
  less accumulated depreciation-6,205,000,000 -6,746,000,000 -6,586,000,000 -6,424,000,000 -6,983,000,000 -7,093,000,000 -6,934,000,000 -6,761,000,000 -6,607,000,000 -6,876,000,000 -6,748,000,000 -6,570,000,000 -6,394,000,000 -6,232,000,000 -6,054,000,000 -5,886,000,000 -5,718,000,000 -5,541,000,000 -5,373,000,000 -5,207,000,000 -5,309,000,000 -5,355,000,000 -5,434,000,000 -5,255,000,000 -5,626,000,000 -5,427,000,000 -5,403,000,000 -5,206,000,000 -5,278,000,000 -5,494,000,000 -5,117,000,000 -5,816,000,000 -6,279,000,000 -6,078,000,000 -5,668,000,000 -5,456,000,000 -5,260,000,000 -5,051,000,000 -6,174,000,000 -6,978,000,000 -8,419,000,000 -8,169,000,000 -7,897,000,000 -7,720,000,000 -7,596,000,000 -7,461,000,000 7,443,000,000 9,165,000,000 8,760,000,000 8,413,000,000 8,144,000,000 7,887,000,000 7,763,000,000 7,423,000,000 7,034,000,000 6,728,000,000 6,333,000,000 5,983,000,000 5,624,000,000 5,319,000,000 4,975,000,000 
  deferred tax assets48,000,000 50,000,000 45,000,000 165,000,000 30,000,000 45,000,000 44,000,000 26,000,000 45,000,000 17,000,000 13,000,000 11,000,000 7,000,000 7,000,000 7,000,000                                               
  other assets1,011,000,000 1,051,000,000 1,043,000,000 1,014,000,000 1,077,000,000 1,166,000,000 1,139,000,000 1,091,000,000 994,000,000 988,000,000 890,000,000 908,000,000 904,000,000 920,000,000 959,000,000 947,000,000 956,000,000 974,000,000 995,000,000 997,000,000 1,008,000,000 1,000,000,000 990,000,000 1,054,000,000 1,048,000,000 1,159,000,000 448,000,000 444,000,000 444,000,000 354,000,000 341,000,000 359,000,000 400,000,000 329,000,000 369,000,000 410,000,000 493,000,000 597,000,000 696,000,000 874,000,000 895,000,000 939,000,000 924,000,000 1,080,000,000 1,145,000,000 1,306,000,000 1,523,000,000 1,769,000,000 1,745,000,000 1,223,000,000 1,070,000,000 1,001,000,000 1,026,000,000 1,015,000,000 984,000,000 970,000,000 808,000,000 751,000,000 842,000,000 856,000,000 867,000,000 
  total assets17,811,000,000 19,019,000,000 19,371,000,000 19,510,000,000 20,325,000,000 19,937,000,000 20,254,000,000 20,008,000,000 20,213,000,000 20,194,000,000 20,436,000,000 20,621,000,000 20,550,000,000 20,363,000,000 20,681,000,000 20,976,000,000 21,198,000,000 21,360,000,000 21,804,000,000 22,472,000,000 22,825,000,000 23,451,000,000 24,105,000,000 24,449,000,000 25,624,000,000 25,450,000,000 25,665,000,000 23,462,000,000 24,246,000,000 25,695,000,000 22,441,000,000 23,847,000,000 26,889,000,000 26,167,000,000 26,245,000,000 26,329,000,000 25,835,000,000 26,973,000,000 27,105,000,000 28,413,000,000 29,964,000,000 32,067,000,000 31,897,000,000 32,546,000,000 32,601,000,000 32,215,000,000 32,675,000,000 34,442,000,000 35,088,000,000 36,645,000,000 36,936,000,000 37,210,000,000 36,811,000,000 39,330,000,000 37,552,000,000 36,838,000,000 36,436,000,000 36,018,000,000 35,257,000,000 35,259,000,000 35,171,000,000 
  liabilities and equity                                                             
  accounts payable253,000,000 273,000,000 255,000,000 255,000,000 296,000,000 301,000,000 323,000,000 316,000,000 285,000,000 246,000,000 281,000,000 275,000,000 173,000,000 206,000,000 228,000,000 215,000,000 198,000,000 189,000,000 194,000,000 214,000,000 264,000,000 244,000,000 311,000,000 308,000,000 276,000,000 212,000,000 269,000,000 172,000,000 163,000,000 211,000,000 172,000,000 173,000,000 206,000,000 257,000,000 370,000,000 448,000,000 432,000,000 585,000,000 619,000,000 784,000,000 892,000,000 764,000,000 931,000,000 1,106,000,000 962,000,000 921,000,000 843,000,000 917,000,000 880,000,000 755,000,000 742,000,000 808,000,000 847,000,000 791,000,000 968,000,000 746,000,000 780,000,000 827,000,000 829,000,000 745,000,000 914,000,000 
  accrued income taxes8,000,000 24,000,000 31,000,000 13,000,000 22,000,000 2,000,000 23,000,000 20,000,000 16,000,000 28,000,000 19,000,000 4,000,000 6,000,000 19,000,000 17,000,000 10,000,000 8,000,000 29,000,000 28,000,000 42,000,000 42,000,000 41,000,000 64,000,000 35,000,000 29,000,000 50,000,000 70,000,000 26,000,000 76,000,000 112,000,000 159,000,000 69,000,000 95,000,000 105,000,000 89,000,000 82,000,000 82,000,000 76,000,000 217,000,000 131,000,000 130,000,000 83,000,000 74,000,000 53,000,000 176,000,000 131,000,000 111,000,000 121,000,000 89,000,000 23,000,000 26,000,000 67,000,000 116,000,000 226,000,000 154,000,000 240,000,000 240,000,000 136,000,000 235,000,000 299,000,000 317,000,000 
  debt due within one year666,000,000 712,000,000 686,000,000 457,000,000 526,000,000 463,000,000 370,000,000 320,000,000 293,000,000 283,000,000 719,000,000 750,000,000 847,000,000 636,000,000 513,000,000 575,000,000 536,000,000 524,000,000 505,000,000 640,000,000 578,000,000 581,000,000 568,000,000 349,000,000 349,000,000 343,000,000 373,000,000 372,000,000 1,816,000,000 1,879,000,000 799,000,000 865,000,000 724,000,000 1,069,000,000 1,200,000,000 1,093,000,000 123,000,000 1,026,000,000 1,024,000,000 1,033,000,000 362,000,000 159,000,000 162,000,000 160,000,000 162,000,000 161,000,000 236,000,000 2,772,000,000 1,942,000,000 1,830,000,000 1,820,000,000 1,965,000,000 1,917,000,000 1,635,000,000 1,580,000,000 1,447,000,000 1,868,000,000 702,000,000 1,163,000,000 2,040,000,000 664,000,000 
  other current liabilities655,000,000 647,000,000 691,000,000 706,000,000 729,000,000 619,000,000 681,000,000 525,000,000 547,000,000 496,000,000 539,000,000 476,000,000 507,000,000 491,000,000 545,000,000 551,000,000 577,000,000 561,000,000 659,000,000 655,000,000 704,000,000 728,000,000 781,000,000 797,000,000 807,000,000 791,000,000 746,000,000 752,000,000 771,000,000 820,000,000 755,000,000 751,000,000 960,000,000 875,000,000 929,000,000 1,046,000,000 1,193,000,000 1,215,000,000 1,313,000,000 1,822,000,000 2,162,000,000 2,391,000,000 1,596,000,000 2,072,000,000 2,418,000,000 2,552,000,000 2,158,000,000 2,888,000,000 2,350,000,000 1,566,000,000 1,800,000,000 906,000,000 861,000,000 2,030,000,000 1,884,000,000 787,000,000 730,000,000 919,000,000 732,000,000 705,000,000 806,000,000 
  total current liabilities1,582,000,000 1,656,000,000 1,663,000,000 1,431,000,000 1,573,000,000 1,385,000,000 1,397,000,000 1,181,000,000 1,141,000,000 1,053,000,000 1,558,000,000 1,505,000,000 1,533,000,000 1,352,000,000 1,303,000,000 1,351,000,000 1,319,000,000 1,303,000,000 1,386,000,000 1,551,000,000 1,588,000,000 1,594,000,000 1,724,000,000 1,489,000,000 1,461,000,000 1,396,000,000 1,458,000,000 1,322,000,000 2,826,000,000 3,022,000,000 1,885,000,000 1,858,000,000 1,985,000,000 2,306,000,000 2,588,000,000 2,669,000,000 1,830,000,000 2,902,000,000 3,173,000,000 3,770,000,000 3,546,000,000 3,397,000,000 2,763,000,000 3,554,000,000 3,776,000,000 3,795,000,000 3,376,000,000 6,726,000,000 5,358,000,000 4,270,000,000 4,484,000,000 3,841,000,000 3,836,000,000 4,764,000,000 4,668,000,000 3,302,000,000 3,618,000,000 2,584,000,000 2,959,000,000 3,789,000,000 2,701,000,000 
  long-term debt5,885,000,000 5,936,000,000 6,195,000,000 6,503,000,000 6,775,000,000 6,802,000,000 7,043,000,000 7,066,000,000 7,154,000,000 7,342,000,000 6,628,000,000 6,451,000,000 6,376,000,000 6,375,000,000 6,657,000,000 6,773,000,000 6,991,000,000 7,096,000,000 7,302,000,000 7,794,000,000 8,480,000,000 8,576,000,000 8,693,000,000 9,041,000,000 9,378,000,000 9,071,000,000 9,605,000,000 8,955,000,000 7,814,000,000 7,976,000,000 6,501,000,000 6,525,000,000 7,740,000,000 7,191,000,000 7,253,000,000 7,397,000,000   8,996,000,000 9,059,000,000 9,991,000,000 10,298,000,000 10,308,000,000 10,379,000,000 10,388,000,000 10,460,000,000 10,804,000,000 9,862,000,000 10,756,000,000 8,402,000,000 8,375,000,000 8,361,000,000 8,354,000,000 10,237,000,000 8,862,000,000 8,990,000,000 9,849,000,000 11,220,000,000 10,890,000,000 10,924,000,000 13,522,000,000 
  deferred tax liabilities345,000,000 519,000,000 499,000,000 570,000,000 470,000,000 377,000,000 540,000,000 507,000,000 552,000,000 533,000,000 493,000,000 471,000,000 472,000,000 470,000,000 447,000,000                                               
  other long-term liabilities645,000,000 697,000,000 729,000,000 778,000,000 798,000,000 851,000,000 858,000,000 936,000,000 961,000,000 941,000,000 965,000,000 963,000,000 994,000,000 1,035,000,000 1,068,000,000 1,227,000,000 1,251,000,000 1,302,000,000 1,366,000,000 1,430,000,000 1,476,000,000 1,529,000,000 1,555,000,000 1,784,000,000 1,820,000,000 1,968,000,000 1,424,000,000 1,149,000,000 1,172,000,000 1,131,000,000 1,098,000,000 1,058,000,000 1,153,000,000 967,000,000 1,027,000,000 1,108,000,000   1,263,000,000 1,354,000,000 1,210,000,000 1,236,000,000 1,281,000,000 1,554,000,000 1,717,000,000 1,787,000,000 1,955,000,000 1,581,000,000 1,903,000,000 1,730,000,000 1,754,000,000 1,840,000,000 1,772,000,000 1,752,000,000 1,683,000,000 1,707,000,000 1,684,000,000 1,736,000,000 1,714,000,000 1,753,000,000 1,755,000,000 
  total long-term liabilities6,875,000,000 7,152,000,000 7,423,000,000 7,851,000,000 8,043,000,000 8,030,000,000 8,441,000,000 8,509,000,000 8,667,000,000 8,816,000,000 8,086,000,000 7,885,000,000 7,842,000,000 7,880,000,000 8,172,000,000 8,358,000,000 8,567,000,000 8,717,000,000 8,983,000,000 9,518,000,000 10,250,000,000 10,382,000,000 10,514,000,000 11,018,000,000 11,406,000,000 11,101,000,000 11,093,000,000 10,179,000,000 9,058,000,000 9,189,000,000 7,705,000,000 7,738,000,000 9,071,000,000 8,448,000,000 8,590,000,000 8,844,000,000   10,411,000,000 10,650,000,000 11,459,000,000 11,891,000,000 11,957,000,000 12,307,000,000 12,566,000,000 12,756,000,000 13,272,000,000 12,107,000,000 13,923,000,000 11,492,000,000 11,513,000,000 11,607,000,000 11,575,000,000 13,527,000,000 12,157,000,000 12,330,000,000 12,259,000,000 13,728,000,000 13,303,000,000 13,350,000,000 15,943,000,000 
  commitments and contingencies                                                             
  shares, 0.10 par value, 1,204,009,681 authorized, 141,262,093 conditionally authorized, 1,204,009,681 issued                                                             
  and 902,249,348 outstanding at june 30, 2025, and 1,057,879,029 authorized, 141,262,093 conditionally authorized,                                                             
  940,828,901 issued and 875,830,772 outstanding at december 31, 202490,000,000                                                             
  additional paid-in capital14,966,000,000 14,887,000,000 14,880,000,000 14,871,000,000 14,859,000,000 14,553,000,000 14,544,000,000 14,364,000,000 14,233,000,000 13,992,000,000 13,984,000,000 13,979,000,000 13,899,000,000 13,790,000,000 13,683,000,000 13,659,000,000 13,578,000,000 13,508,000,000 13,501,000,000 13,493,000,000 13,438,000,000 13,431,000,000 13,424,000,000 13,415,000,000 13,405,000,000 13,396,000,000 13,394,000,000 12,033,000,000 12,022,000,000 11,953,000,000 11,020,000,000 11,011,000,000 10,993,000,000 10,682,000,000 10,674,000,000 5,739,000,000   5,806,000,000 5,797,000,000 5,775,000,000 5,720,000,000 6,792,000,000 6,784,000,000 6,766,000,000 6,731,000,000 7,511,000,000 7,472,000,000 7,211,000,000 6,545,000,000 6,529,000,000 7,518,000,000 7,504,000,000 6,354,000,000 6,421,000,000 7,433,000,000 7,407,000,000 7,394,000,000 7,388,000,000 7,344,000,000 6,492,000,000 
  accumulated deficit-5,562,000,000 -4,624,000,000 -4,545,000,000 -4,552,000,000 -4,058,000,000 -3,935,000,000 -4,033,000,000 -3,929,000,000 -3,709,000,000 -3,544,000,000 -3,079,000,000 -2,729,000,000 -2,701,000,000 -2,633,000,000 -2,458,000,000 -2,198,000,000 -2,068,000,000 -1,965,000,000 -1,866,000,000 -1,829,000,000 -2,188,000,000 -1,691,000,000 -1,297,000,000 -1,246,000,000 -421,000,000 -213,000,000                                    
  accumulated other comprehensive loss-141,000,000 -141,000,000 -138,000,000 -179,000,000 -180,000,000 -179,000,000 -177,000,000 -196,000,000 -196,000,000 -196,000,000 -185,000,000 -91,000,000 -93,000,000 -94,000,000 -84,000,000 -261,000,000 -264,000,000 -267,000,000 -263,000,000 -327,000,000 -329,000,000 -331,000,000 -324,000,000 -295,000,000 -295,000,000 -296,000,000 -279,000,000 -290,000,000 -291,000,000 -292,000,000 -298,000,000 -300,000,000 -283,000,000 -327,000,000 -339,000,000 -334,000,000 -368,000,000 -410,000,000 -414,000,000 -404,000,000 -185,000,000 -188,000,000 -263,000,000 -262,000,000 -426,000,000 -434,000,000 -540,000,000 -516,000,000 -496,000,000 -338,000,000 -328,000,000 -335,000,000 -332,000,000 -327,000,000 -336,000,000 -338,000,000 -335,000,000 -442,000,000 -449,000,000 -448,000,000 -420,000,000 
  total controlling interest shareholders’ equity9,353,000,000 10,210,000,000 10,284,000,000 10,227,000,000 10,708,000,000 10,521,000,000 10,415,000,000 10,317,000,000 10,404,000,000 10,324,000,000 10,791,000,000 11,230,000,000 11,174,000,000 11,130,000,000 11,205,000,000 11,263,000,000 11,308,000,000 11,336,000,000 11,432,000,000 11,397,000,000 10,981,000,000 11,469,000,000 11,862,000,000 11,933,000,000 12,748,000,000 12,946,000,000 13,107,000,000 11,962,000,000 12,359,000,000 13,424,000,000 12,799,000,000 14,205,000,000 15,802,000,000 15,084,000,000 14,758,000,000 14,498,000,000   13,201,000,000 13,671,000,000 14,606,000,000 16,764,000,000 17,171,000,000 16,691,000,000 16,274,000,000 15,682,000,000 16,049,000,000 15,623,000,000 15,701,000,000 20,823,000,000 20,885,000,000 21,710,000,000 21,383,000,000 21,036,000,000 20,724,000,000 21,198,000,000 20,552,000,000 19,707,000,000 18,982,000,000 18,120,000,000  
  noncontrolling interest1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000 4,000,000 4,000,000 4,000,000 3,000,000 6,000,000 6,000,000 6,000,000 5,000,000 9,000,000 9,000,000 7,000,000 7,000,000  3,000,000 3,000,000 4,000,000 4,000,000 3,000,000 308,000,000 298,000,000 310,000,000 306,000,000 308,000,000 309,000,000 311,000,000 346,000,000 11,000,000 4,000,000 -6,000,000 -15,000,000 -18,000,000 -22,000,000 -14,000,000 -10,000,000 -11,000,000 -12,000,000 -5,000,000 -8,000,000 3,000,000 3,000,000 8,000,000 7,000,000 -1,000,000 13,000,000   
  total equity9,354,000,000 10,211,000,000 10,285,000,000 10,228,000,000 10,709,000,000 10,522,000,000 10,416,000,000 10,318,000,000 10,405,000,000 10,325,000,000 10,792,000,000 11,231,000,000 11,175,000,000 11,131,000,000 11,206,000,000 11,267,000,000 11,312,000,000 11,340,000,000 11,435,000,000 11,403,000,000 10,987,000,000 11,475,000,000 11,867,000,000 11,942,000,000 12,757,000,000 12,953,000,000 13,114,000,000 11,961,000,000 12,362,000,000 13,427,000,000 12,803,000,000 14,209,000,000 15,805,000,000 15,392,000,000 15,056,000,000 14,808,000,000 14,026,000,000 13,648,000,000 13,510,000,000 13,982,000,000 14,952,000,000 16,775,000,000 17,175,000,000 16,685,000,000 16,259,000,000 15,664,000,000 16,027,000,000 15,609,000,000 15,691,000,000 20,812,000,000 20,873,000,000 21,705,000,000 21,375,000,000 21,039,000,000 20,727,000,000 21,206,000,000 20,559,000,000 19,706,000,000 18,995,000,000 18,120,000,000  
  total liabilities and equity17,811,000,000 19,019,000,000 19,371,000,000 19,510,000,000 20,325,000,000 19,937,000,000 20,254,000,000 20,008,000,000 20,213,000,000 20,194,000,000 20,436,000,000 20,621,000,000 20,550,000,000 20,363,000,000 20,681,000,000 20,976,000,000 21,198,000,000 21,360,000,000 21,804,000,000 22,472,000,000 22,825,000,000 23,451,000,000 24,105,000,000 24,449,000,000 25,624,000,000 25,450,000,000 25,665,000,000 23,462,000,000 24,246,000,000 25,695,000,000 22,441,000,000 23,847,000,000 26,889,000,000 26,167,000,000 26,245,000,000 26,329,000,000 25,835,000,000 26,973,000,000 27,105,000,000 28,413,000,000 29,964,000,000 32,067,000,000 31,897,000,000 32,546,000,000 32,601,000,000 32,215,000,000 32,675,000,000 34,442,000,000 35,088,000,000 36,645,000,000 36,936,000,000 37,210,000,000 36,811,000,000 39,330,000,000 37,552,000,000 36,838,000,000 36,436,000,000 36,018,000,000 35,257,000,000 35,259,000,000  
  materials and supplies, net of allowance of 184 and 178 at march 31, 2025 and december 31, 2024, respectively 453,000,000                                                            
  shares, 0.10 par value, 1,057,879,029 authorized, 141,262,093 conditionally authorized, 940,828,901 issued                                                             
  and 883,261,456 outstanding at march 31, 2025, and 0.10 par value, 1,057,879,029 authorized,                                                             
  141,262,093 conditionally authorized, 940,828,901 issued and 875,830,772 outstanding at december 31, 2024 88,000,000                                                            
  materials and supplies  439,000,000    426,000,000    388,000,000    392,000,000    434,000,000    479,000,000    474,000,000      561,000,000   635,000,000    818,000,000    743,000,000     627,000,000    517,000,000    462,000,000    432,000,000 
  contract intangible assets      4,000,000 11,000,000 19,000,000 38,000,000 56,000,000 75,000,000 114,000,000 144,000,000 173,000,000 223,000,000 280,000,000 337,000,000 393,000,000 450,000,000 507,000,000 560,000,000 608,000,000 655,000,000 703,000,000 750,000,000 795,000,000 554,000,000 583,000,000 613,000,000                                
  and 875,830,772 outstanding at december 31, 2024, and chf 0.10 par value, 1,021,294,549 authorized,                                                             
  142,362,093 conditionally authorized, 843,715,858 issued and 809,030,846 outstanding at december 31, 2023  87,000,000 87,000,000 87,000,000                                                         
  materials and supplies, net of allowance of 176 and 198 at september 30, 2024 and december 31, 2023, respectively   425,000,000                                                          
  and 875,803,595 outstanding at september 30, 2024, and chf 0.10 par value, 1,021,294,549 authorized,                                                             
  materials and supplies, net of allowance of 197 and 198 at june 30, 2024 and december 31, 2023, respectively    440,000,000                                                         
  and 875,456,314 outstanding at june 30, 2024, and chf 0.10 par value, 1,021,294,549 authorized,                                                             
  materials and supplies, net of allowance of 202 and 198 at march 31, 2024 and december 31, 2023, respectively     437,000,000                                                        
  shares, chf 0.10 par value, 1,022,394,549 authorized, 141,262,093 conditionally authorized, 862,815,858 issued                                                             
  and 819,579,665 outstanding at march 31, 2024, and 1,021,294,549 authorized, 142,362,093 conditionally                                                             
  authorized, 843,715,858 issued and 809,030,846 outstanding at december 31, 2023     82,000,000                                                        
  shares, chf 0.10 par value, 1,021,294,549 authorized, 142,362,093 conditionally authorized, 843,715,858 issued                                                             
  and 809,030,846 outstanding at december 31, 2023, and 905,093,509 authorized, 142,362,675 conditionally                                                             
  authorized, 797,244,753 issued and 721,888,427 outstanding at december 31, 2022      81,000,000 78,000,000 76,000,000 72,000,000                                                    
  materials and supplies, net of allowance of 206 and 199 at september 30, 2023 and december 31, 2022, respectively       410,000,000                                                      
  and 782,540,300 outstanding at september 30, 2023, and 905,093,509 authorized, 142,362,675 conditionally                                                             
  materials and supplies, net of allowance of 202 and 199 at june 30, 2023 and december 31, 2022, respectively        397,000,000                                                     
  shares, chf 0.10 par value, 1,021,294,549 authorized, 142,362,093 conditionally authorized, 831,845,482 issued                                                             
  and 766,655,180 outstanding at june 30, 2023, and 905,093,509 authorized, 142,362,675 conditionally                                                             
  materials and supplies, net of allowance of 201 and 199 at march 31, 2023 and december 31, 2022, respectively         390,000,000                                                    
  shares, chf 0.10 par value, 905,094,091 authorized, 142,362,093 conditionally authorized, 797,245,335 issued                                                             
  and 731,847,899 outstanding at march 31, 2023, and 905,093,509 authorized, 142,362,675 conditionally                                                             
  shares, chf 0.10 par value, 905,093,509 authorized, 142,362,675 conditionally authorized, 797,244,753 issued                                                             
  and 721,888,427 outstanding at december 31, 2022, and 891,379,306 authorized, 142,363,356 conditionally                                                             
  authorized, 728,176,456 issued and 655,505,335 outstanding at december 31, 2021          71,000,000 71,000,000 69,000,000 67,000,000                                                
  materials and supplies, net of allowance of 194 and 183 at september 30, 2022 and december 31, 2021, respectively           398,000,000                                                  
  and 721,888,427 outstanding at september 30, 2022, and 891,379,306 authorized, 142,363,356 conditionally                                                             
  materials and supplies, net of allowance of 191 and 183 at june 30, 2022 and december 31, 2021, respectively            389,000,000                                                 
  shares, chf 0.10 par value, 905,093,509 authorized, 142,362,675 conditionally authorized, 754,244,753 issued                                                             
  and 705,711,203 outstanding at june 30, 2022, and 891,379,306 authorized, 142,363,356 conditionally                                                             
  materials and supplies, net of allowance of 188 and 183 at march 31, 2022 and december 31, 2021, respectively             386,000,000                                                
  shares, chf 0.10 par value, 891,379,306 authorized, 142,363,356 conditionally authorized, 754,244,072 issued                                                             
  and 681,055,270 outstanding at march 31, 2022, and 891,379,306 authorized, 142,363,356 conditionally                                                             
  shares, chf 0.10 par value, 891,379,306 authorized, 142,363,356 conditionally authorized, 728,176,456 issued                                                             
  and 655,505,335 outstanding at december 31, 2021, and 824,650,660 authorized, 142,363,647 conditionally                                                             
  authorized, 639,676,165 issued and 615,140,276 outstanding at december 31, 2020              64,000,000 63,000,000 62,000,000 60,000,000                                            
  materials and supplies, net of allowance of 148 and 143 at september 30, 2021 and december 31, 2020, respectively               433,000,000                                              
  deferred income taxes               9,000,000 8,000,000 11,000,000 9,000,000 19,000,000 17,000,000 20,000,000 20,000,000 21,000,000 71,000,000 58,000,000 66,000,000 40,000,000 44,000,000 54,000,000 167,000,000 301,000,000 298,000,000 247,000,000 287,000,000 316,000,000 99,000,000 180,000,000 157,000,000 161,000,000 160,000,000 162,000,000 155,000,000 151,000,000 173,000,000 167,000,000 151,000,000 142,000,000 142,000,000 120,000,000 112,000,000 116,000,000 115,000,000 100,000,000 121,000,000 113,000,000 104,000,000 87,000,000 46,000,000 50,000,000 63,000,000 
  shares, chf 0.10 par value, 891,379,306 authorized, 142,363,356 conditionally authorized, 685,676,456 issued                                                             
  and 651,155,650 outstanding at september 30, 2021, and 824,650,660 authorized, 142,363,647 conditionally                                                             
  materials and supplies, net of allowance of 145 and 143 at june 30, 2021 and december 31, 2020, respectively                433,000,000                                             
  shares, chf 0.10 par value, 891,379,015 authorized, 142,363,647 conditionally authorized, 685,676,165 issued                                                             
  and 634,629,502 outstanding at june 30, 2021, and 824,650,660 authorized, 142,363,647 conditionally                                                             
  materials and supplies, net of allowance of 144 and 143 at march 31, 2021 and december 31, 2020, respectively                 433,000,000                                            
  shares, chf 0.10 par value, 824,650,668 authorized, 142,363,647 conditionally authorized, 639,676,165 issued                                                             
  and 617,288,705 outstanding at march 31, 2021, and 824,650,660 authorized, 142,363,647 conditionally                                                             
  shares, chf 0.10 par value, 824,650,660 authorized, 142,363,647 conditionally authorized, 639,676,165 issued                                                             
  and 615,140,276 outstanding at december 31, 2020, and 639,674,422 authorized, 142,365,398 conditionally                                                             
  authorized, 617,970,525 issued and 611,871,374 outstanding at december 31, 2019                  60,000,000 60,000,000 60,000,000 60,000,000                                        
  materials and supplies, net of allowance of 118 and 127 at september 30, 2020 and december 31, 2019, respectively                   459,000,000                                          
  restricted cash accounts and investments                   448,000,000 437,000,000 531,000,000 558,000,000 551,000,000 610,000,000 583,000,000 551,000,000 561,000,000 490,000,000 484,000,000                                
  shares, chf 0.10 par value, 824,648,925 authorized, 142,365,398 conditionally authorized, 639,674,414 issued                                                             
  and 614,861,972 outstanding at september 30, 2020, and 639,674,422 authorized, 142,365,398 conditionally                                                             
  materials and supplies, net of allowance of 122 and 127 at june 30, 2020 and december 31, 2019, respectively                    457,000,000                                         
  and 614,612,545 outstanding at june 30, 2020, and 639,674,422 authorized, 142,365,398 conditionally                                                             
  materials and supplies, net of allowance of 127 at march 31, 2020 and december 31, 2019                     459,000,000                                        
  shares, chf 0.10 par value, 639,674,422 authorized, 142,365,398 conditionally authorized, 617,970,525 issued                                                             
  and 614,545,303 outstanding at march 31, 2020, and 639,674,422 authorized, 142,365,398 conditionally                                                             
  and 611,871,374 outstanding at december 31, 2019, and 638,285,574 authorized, 143,754,246 conditionally                                                             
  authorized, 610,581,677 issued and 609,649,291 outstanding at december 31, 2018                      59,000,000 59,000,000 59,000,000 59,000,000                                    
  of less than 1 at december 31, 2018                       639,000,000 645,000,000                                     
  materials and supplies, net of allowance for obsolescence                                                             
  of 123 and 134 at september 30, 2019 and december 31, 2018, respectively                       475,000,000                                      
  and 611,849,468 outstanding at september 30, 2019, and 638,285,574 authorized, 143,754,246 conditionally                                                             
  of 133 and 134 at june 30, 2019 and december 31, 2018, respectively                        488,000,000                                     
  and 611,741,184 outstanding at june 30, 2019, and 638,285,574 authorized, 143,754,246 conditionally                                                             
  of less than 1 at march 31, 2019 and december 31, 2018                         665,000,000                                    
  of 135 and 134 at march 31, 2019 and december 31, 2018, respectively                         488,000,000                                    
  shares, chf 0.10 par value, 639,674,422 authorized, 142,365,398 conditionally authorized, 611,970,525 issued                                                             
  and 611,614,353 outstanding at march 31, 2019, and 638,285,574 authorized, 143,754,246 conditionally                                                             
  short-term investments                             150,000,000                           38,000,000 180,000,000 174,000,000 112,000,000 333,000,000 
  redeemable noncontrolling interest                             57,000,000 48,000,000 42,000,000 28,000,000 21,000,000 11,000,000 8,000,000 15,000,000 10,000,000 11,000,000 11,000,000 7,000,000 4,000,000 2,000,000      116,000,000 71,000,000 66,000,000 57,000,000 25,000,000         
  shares, chf 0.10 par value, 638,285,574 authorized, 143,754,246 conditionally authorized, 610,581,677 issued                                                             
  and 609,649,291 outstanding at december 31, 2018, and 417,060,033 authorized, 143,783,041 conditionally                                                             
  authorized, 394,801,990 issued and 391,237,308 outstanding at december 31, 2017                          59,000,000 44,000,000                                  
  retained earnings                          -67,000,000 175,000,000 584,000,000 1,719,000,000 2,040,000,000 3,457,000,000 5,056,000,000 4,695,000,000 4,389,000,000 4,140,000,000 3,529,000,000 3,208,000,000 2,866,000,000 3,349,000,000 4,088,000,000 6,305,000,000 5,718,000,000 5,262,000,000 5,029,000,000 4,483,000,000 4,176,000,000 3,780,000,000 4,244,000,000 10,363,000,000 10,434,000,000 10,279,000,000 9,969,000,000 10,768,000,000 10,400,000,000 9,685,000,000 9,008,000,000 8,285,000,000 7,575,000,000 6,769,000,000 6,008,000,000 
  of less than 1 at september 30, 2018 and december 31, 2017                           627,000,000                                  
  of 139 and 141 at september 30, 2018 and december 31, 2017, respectively                           401,000,000                                  
  shares, chf 0.10 par value, 490,584,698 authorized, 143,754,927 conditionally authorized, 462,880,809 issued                                                             
  and 461,903,386 outstanding at september 30, 2018, and 417,060,033 authorized, 143,783,041 conditionally                                                             
  materials and supplies, net of allowance for obsolescence of 145 and 141 at june 30, 2018 and december 31, 2017, respectively                            414,000,000                                 
  shares, chf 0.10 par value, 490,568,452 authorized, 143,771,173 conditionally authorized, 462,864,563 issued and 461,862,248 outstanding at june 30, 2018, and 417,060,033 authorized, 143,783,041 conditionally authorized, 394,801,990 issued and 391,237,308 outstanding at december 31, 2017                            44,000,000                                 
  materials and supplies, net of allowance for obsolescence of 149 and 141 at march 31, 2018 and december 31, 2017, respectively                             457,000,000                                
  goodwill                             460,000,000           1,014,000,000 2,987,000,000 2,987,000,000 2,987,000,000 2,987,000,000 2,987,000,000 2,987,000,000 3,099,000,000 3,205,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,132,000,000 8,134,000,000 8,134,000,000 8,134,000,000 8,134,000,000 8,128,000,000 
  shares, chf 0.10 par value, 509,382,402 authorized, 143,783,041 conditionally authorized, 462,853,862 issued and 461,628,198 outstanding at march 31, 2018, and 417,060,033 authorized, 143,783,041 conditionally authorized, 394,801,990 issued and 391,237,308 outstanding at december 31, 2017                             44,000,000                                
  materials and supplies, net of allowance for obsolescence of 154 and 153 at september 30, 2017 and december 31, 2016, respectively                              437,000,000                               
  restricted cash                              480,000,000 537,000,000 466,000,000 366,000,000 338,000,000 340,000,000                          
  shares, chf 0.10 par value, 417,060,033 authorized, 143,783,041 conditionally authorized and 394,801,990 issued at september 30, 2017 and december 31, 2016 and 391,211,739 and 389,366,241 outstanding at september 30, 2017 and december 31, 2016, respectively                              37,000,000                               
  materials and supplies, net of allowance for obsolescence of 150 and 153 at june 30, 2017 and december 31, 2016, respectively                               517,000,000                              
  shares, chf 0.10 par value, 417,060,033 authorized, 143,783,041 conditionally authorized and 394,801,990 issued at june 30, 2017 and december 31, 2016 and 391,181,430 and 389,366,241 outstanding at june 30, 2017 and december 31, 2016, respectively                               37,000,000                              
  trade                                833,000,000   1,343,000,000    2,084,000,000    2,112,000,000     2,049,000,000    1,811,000,000    2,330,000,000    2,798,000,000 
  other                                65,000,000   36,000,000    36,000,000    50,000,000     127,000,000    189,000,000    55,000,000    66,000,000 
  shares, chf 0.10 par value, 417,060,033 authorized, 143,783,041 conditionally authorized, 394,801,990 issued and 389,366,241 outstanding at december 31, 2016 and chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 364,035,397 outstanding at december 31, 2015                                36,000,000                             
  treasury shares, at cost, 2,863,267 held at december 31, 2015                                                             
  materials and supplies, net of allowance for obsolescence of 159 and 148 at september 30, 2016 and december 31, 2015, respectively                                 585,000,000                            
  shares, chf 0.10 par value, 393,397,220 authorized, 167,617,649 conditionally authorized, 370,967,382 issued and 365,461,629 outstanding at september 30, 2016 and chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 364,035,397 outstanding at december 31, 2015                                 34,000,000                            
  materials and supplies, net of allowance for obsolescence of 154 and 148 at march 31, 2016 and december 31, 2015, respectively                                  625,000,000                           
  shares, chf 0.10 par value, 393,397,220 authorized, 167,617,649 conditionally authorized, 370,967,382 issued and 365,081,912 outstanding at march 31, 2016 and chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 364,035,397 outstanding at december 31, 2015                                  34,000,000                           
  shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at december 31, 2015 and 2014 and 364,035,397 and 362,279,530 outstanding at december 31, 2015 and 2014, respectively.                                   5,193,000,000                          
  treasury shares, at cost, 2,863,267 held at december 31, 2015 and 2014                                   -240,000,000                          
  materials and supplies, net of allowance for obsolescence of 139 and 109 at september 30, 2015 and december 31, 2014, respectively                                    696,000,000                         
  long‑term debt                                    8,630,000,000 8,989,000,000                        
  other long‑term liabilities                                    1,162,000,000 1,236,000,000                        
  total long‑term liabilities                                    9,964,000,000 10,413,000,000                        
  shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at september 30, 2015 and december 31, 2014 and 363,719,800 and 362,279,530 outstanding at september 30, 2015 and december 31, 2014, respectively                                    5,189,000,000                         
  additional paid‑in capital                                    5,610,000,000 5,596,000,000                        
  treasury shares, at cost, 2,863,267 held at september 30, 2015 and december 31, 2014                                    -240,000,000                         
  total controlling interest shareholders' equity                                    13,720,000,000 13,340,000,000                        
  materials and supplies, net of allowance for obsolescence of 107 and 109 at june 30, 2015 and december 31, 2014, respectively                                     741,000,000                        
  shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at june 30, 2015 and december 31, 2014 and 363,548,290 and 362,279,530 outstanding at june 30, 2015 and december 31, 2014, respectively                                     5,186,000,000                        
  treasury shares, at cost, 2,863,267 held at june 30, 2015 and december 31, 2014                                     -240,000,000                        
  materials and supplies, net of allowance for obsolescence of 112 and 109 at march 31, 2015 and december 31, 2014, respectively                                      807,000,000                       
  shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at march 31, 2015 and december 31, 2014 and 363,346,369 and 362,279,530 outstanding at march 31, 2015 and december 31, 2014, respectively                                      5,183,000,000                       
  treasury shares, at cost, 2,863,267 held at march 31, 2015 and december 31, 2014                                      -240,000,000                       
  shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 362,279,530 outstanding at december 31, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013                                       5,169,000,000                      
  treasury shares, at cost, 2,863,267 held at december 31, 2014 and 2013                                       -240,000,000                      
  materials and supplies, net of allowance for obsolescence of 95 and 80 at september 30, 2014 and december 31, 2013, respectively                                        835,000,000                     
  shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 362,234,868 outstanding at september 30, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013                                        5,168,000,000                     
  treasury shares, at cost, 2,863,267 held at september 30, 2014 and december 31, 2013                                        -240,000,000                     
  materials and supplies, net of allowance for obsolescence of 91 and 80 at june 30, 2014 and december 31, 2013, respectively                                         818,000,000                    
  shares, chf 15.00 par value, 396,260,487 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 362,144,405 outstanding at june 30, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013                                         5,167,000,000                    
  treasury shares, at cost, 2,863,267 held at june 30, 2014 and december 31, 2013                                         -240,000,000                    
  materials and supplies, net of allowance for obsolescence of 84 and 80 at march 31, 2014 and december 31, 2013, respectively                                          768,000,000                   
  shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 361,984,609 outstanding at march 31, 2014 and 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013                                          5,164,000,000                   
  treasury shares, at cost, 2,863,267 held at march 31, 2014 and december 31, 2013                                          -240,000,000                   
  property and equipment of consolidated variable interest entities, net of accumulated depreciation                                           984,000,000 985,000,000 992,000,000                
  debt of consolidated variable interest entities due within one year                                           163,000,000 58,000,000 30,000,000 28,000,000 28,000,000 97,000,000 96,000,000 96,000,000 95,000,000 95,000,000 82,000,000 82,000,000 82,000,000      
  long-term debt of consolidated variable interest entities                                            120,000,000 148,000,000 163,000,000 177,000,000 741,000,000 772,000,000 790,000,000 820,000,000 855,000,000 886,000,000 902,000,000 920,000,000      
  shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,764,100 outstanding at december 31, 2013 and 402,282,355 authorized 167,617,649 conditionally authorized, 373,830,649 issued and 359,505,251 outstanding at december 31, 2012                                           5,147,000,000                  
  treasury shares, at cost, 2,863,267 held at december 31, 2013 and 2012                                           -240,000,000                  
  materials and supplies, net of allowance for obsolescence of 71 and 66 at september 30, 2013 and december 31, 2012, respectively                                            729,000,000                 
  shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,559,090 outstanding at september 30, 2013 and 402,282,355 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 359,505,251 outstanding at december 31, 2012                                            5,145,000,000                 
  treasury shares, at cost, 2,863,267 held at september 30, 2013 and december 31, 2012                                            -240,000,000                 
  materials and supplies, net of allowance for obsolescence of 70 and 66 at june 30, 2013 and december 31, 2012, respectively                                             680,000,000                
  shares, chf 15.00 par value, 373,830,649 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 360,384,335 outstanding at june 30, 2013 and 402,282,355 authorized, 167,617,649 conditionally authorized, 373,830,649 issued and 359,505,251 outstanding at december 31, 2012                                             5,142,000,000                
  treasury shares, at cost, 2,863,267 held at june 30, 2013 and december 31, 2012                                             -240,000,000                
  materials and supplies, net of allowance for obsolescence of 68 and 66 at march 31, 2013 and december 31, 2012, respectively                                              648,000,000               
  property and equipment of consolidated variable interest entities                                              1,071,000,000 813,000,000 2,252,000,000 2,248,000,000 2,243,000,000 2,241,000,000 2,214,000,000 2,192,000,000 2,179,000,000 2,149,000,000      
  shares, chf 15.00 par value, 402,282,355 authorized, 167,617,649 conditionally authorized, 373,830,649 issued at march 31, 2013 and december 31, 2012; 360,340,164 and 359,505,251 outstanding at march 31, 2013 and december 31, 2012, respectively                                              5,142,000,000               
  treasury shares, at cost, 2,863,267 held at march 31, 2013 and december 31, 2012                                              -240,000,000               
  materials and supplies, net of allowance for obsolescence of 81 and 73 at june 30, 2012 and december 31, 2011, respectively                                               676,000,000              
  shares, chf 15.00 par value, 402,282,355 authorized, 167,617,649 conditionally authorized, and 373,830,649 and 365,135,298 issued at june 30, 2012 and december 31, 2011, respectively; 359,284,907 and 349,805,793 outstanding at june 30, 2012 and december 31, 2011, respectively                                               5,127,000,000              
  treasury shares, at cost, 2,863,267 held at june 30, 2012 and december 31, 2011                                               -240,000,000              
  shares, chf 15.00 par value, 365,135,298 authorized, 167,617,649 conditionally authorized, 365,135,298 issued and 349,805,793 outstanding at december 31, 2011; and 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued and 319,080,678 outstanding at december 31, 2010                                                4,982,000,000             
  treasury shares, at cost, 2,863,267 held at december 31, 2011 and 2010                                                -240,000,000             
  materials and supplies, net of allowance for obsolescence of 76 and 70 at september 30, 2011 and december 31, 2010, respectively                                                 578,000,000            
  shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at september 30, 2011 and december 31, 2010; 319,853,371 and 319,080,678 outstanding at september 30, 2011 and december 31, 2010, respectively                                                 4,493,000,000            
  treasury shares, at cost, 2,863,267 held at september 30, 2011 and december 31, 2010                                                 -240,000,000            
  materials and supplies, net of allowance for obsolescence of 73 and 70 at june 30, 2011 and december 31, 2010, respectively                                                  546,000,000           
  shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at june 30, 2011 and december 31, 2010; 319,639,362 and 319,080,678 outstanding at june 30, 2011 and december 31, 2010, respectively                                                  4,490,000,000           
  treasury shares, at cost, 2,863,267 held at june 30, 2011 and december 31, 2010                                                  -240,000,000           
  materials and supplies, net of allowance for obsolescence of 70 at march 31, 2011 and december 31, 2010                                                   541,000,000          
  shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at march 31, 2011 and december 31, 2010; 319,538,901 and 319,080,678 outstanding at march 31, 2011 and december 31, 2010, respectively                                                   4,488,000,000          
  treasury shares, at cost, 2,863,267 held at march 31, 2011 and december 31, 2010                                                   -240,000,000          
  shares, chf 15.00 par value, 335,235,298 authorized, 167,617,649 conditionally authorized, 335,235,298 issued and 319,080,678 outstanding at december 31, 2010; and 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued and 321,223,882 outstanding at december 31, 2009                                                    4,482,000,000         
  treasury shares, at cost, 2,863,267 and none held at december 31, 2010 and 2009, respectively                                                    -240,000,000         
  materials and supplies, net of allowance for obsolescence of 69 and 66 at september 30, 2010 and december 31, 2009, respectively                                                     501,000,000        
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at september 30, 2010 and december 31, 2009; 319,017,904 and 321,223,882 outstanding at september 30, 2010 and december 31, 2009, respectively                                                     4,481,000,000        
  treasury shares, at cost, 2,863,267 and none held at september 30, 2010 and december 31, 2009, respectively                                                     -240,000,000        
  materials and supplies, net of allowance for obsolescence of 66 at june 30, 2010 and december 31, 2009                                                      467,000,000       
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at june 30, 2010 and december 31, 2009; 318,916,207 and 321,223,882 outstanding at june 30, 2010 and december 31, 2009, respectively                                                      4,479,000,000       
  treasury shares, at cost, 2,863,267 and none held at june 30, 2010 and december 31, 2009, respectively                                                      -240,000,000       
  materials and supplies, net of allowance for obsolescence of 64 and 66 at march 31, 2010 and december 31, 2009, respectively                                                       464,000,000      
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at march 31, 2010 and december 31, 2009; 320,950,624 and 321,223,882 outstanding at march 31, 2010 and december 31, 2009, respectively                                                       4,478,000,000      
  treasury shares, at cost, 717,000 and none held at march 31, 2010 and december 31, 2009, respectively                                                       -60,000,000      
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 conditionally authorized, 335,235,298 issued at december 31, 2009 and 2008; 321,223,882 and 319,262,113 outstanding at december 31, 2009 and 2008, respectively                                                        4,472,000,000     
  materials and supplies, net of allowance for obsolescence of 57 and 49 at september 30, 2009 and december 31, 2008, respectively                                                         457,000,000    
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 321,139,451 outstanding at september 30, 2009; 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008                                                         4,470,000,000    
  materials and supplies, net of allowance for obsolescence of 57 and 49 at june 30, 2009 and december 31, 2008, respectively                                                          451,000,000   
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 320,953,074 outstanding at june 30, 2009 and 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008                                                          4,468,000,000   
  materials and supplies, net of allowance for obsolescence of 54 and 49 at march 31, 2009 and december 31, 2008, respectively                                                           458,000,000  
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 320,004,924 outstanding at march 31, 2009 and 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008                                                           4,455,000,000  
  liabilities and shareholders' equity                                                             
  minority interest                                                            3,000,000 
  preference shares, none authorized, issued and outstanding at december 31, 2008; preference shares 0.10 par value, 50,000,000 shares authorized, none issued and outstanding at december 31, 2007                                                             
  shares, chf 15.00 par value, 502,852,947 authorized, 167,617,649 contingently authorized, 335,235,298 issued and 319,262,113 outstanding at december 31, 2008; ordinary shares, 0.01 par value, 800,000,000 shares authorized, 317,222,909 shares issued and outstanding at december 31, 2007                                                            4,444,000,000 
  total shareholders' equity                                                            16,524,000,000 
  total liabilities and shareholders' equity                                                            35,171,000,000 

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