7Baggers

WESCO International . Quarterly Balance Sheets Chart

Quarterly
 | 
Annual
 
 Goodwill  
 Cash and Cash Eq  
 Account Payables  
 Inventory  
20200930 20201231 20210331 20210630 20210930 20211231 20220331 20220630 20220930 20221231 20230331 20230630 20230930 20231231 20240331 20240630 20240930 20241231 20250331 20250630 00.571.131.72.272.843.43.97Billion

WESCO International . 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 2017-12-31 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 2011-03-31 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 2008-09-30 2008-06-30 2008-03-31 2007-12-31 2007-09-30 2007-06-30 2007-03-31 2006-12-31 2006-09-30 2006-06-30 2006-03-31 2005-12-31 2005-09-30 2005-06-30 2005-03-31 2004-12-31 
                                                                                     
  current assets:                                                                                   
  cash and cash equivalents667,000,000 681,600,000 702,600,000 706,800,000 716,500,000 984,100,000 524,100,000 631,400,000 529,000,000 349,100,000 527,348,000 234,083,000 236,792,000 201,474,000 212,583,000 251,799,000 287,891,000 303,887,000 449,135,000 352,249,000 265,222,000 342,560,000 150,902,000 138,160,000 87,218,000 106,100,000 96,343,000 142,760,000 110,940,000 123,897,000 117,953,000 94,083,000 87,799,000 103,000,000 110,131,000 112,837,000 160,290,000 147,834,000 160,279,000 132,852,000 174,307,000 154,351,000 128,319,000 110,368,000 101,643,000 96,356,000 123,725,000 98,575,000 104,512,000 116,791,000 86,099,000 107,637,000 72,198,000 63,641,000 63,869,000 94,049,000 78,615,000 52,432,000 53,577,000 103,120,000 95,804,000 121,074,000 112,329,000 111,345,000 103,290,000 105,135,000 86,338,000 103,270,000 115,532,000 94,432,000 72,297,000 64,498,000 65,038,000 55,369,000 73,395,000 59,273,000 37,823,000 30,350,000 22,125,000 60,866,000 15,021,000 18,765,000 34,523,000 
  trade accounts receivable, net of allowance for expected credit losses of 63.4 and 55.0 in 2025 and 2024, respectively3,942,800,000                                                                                   
  other accounts receivable410,700,000 352,700,000 416,300,000 398,800,000 363,500,000 346,200,000 430,500,000 411,700,000 380,300,000 344,300,000 435,711,000 388,748,000 390,954,000 358,181,000  323,597,000 266,835,000 234,898,000 239,199,000 229,275,000 192,799,000 77,691,000 98,029,000 82,357,000 65,694,000 75,326,000 96,984,000 80,676,000 62,361,000 71,328,000 101,229,000 82,588,000 69,321,000 67,230,000 85,019,000 68,501,000 55,354,000 59,092,000 81,242,000 71,253,000 60,820,000 123,896,000 138,745,000 131,724,000 118,088,000 106,960,000 130,043,000 120,587,000 109,915,000 102,204,000 89,801,000 48,246,000 34,351,000 25,634,000 43,442,000 32,239,000 24,460,000 21,969,000 37,223,000 23,175,000 16,348,000 37,940,000 31,808,000 46,851,000 40,211,000 45,427,000 42,758,000 35,736,000 29,704,000 31,101,000 44,783,000 37,540,000 31,540,000 42,351,000 43,011,000 31,191,000 22,104,000 22,798,000 36,235,000 25,629,000 19,599,000 14,771,000 30,237,000 
  inventories3,971,200,000 3,740,200,000 3,501,700,000 3,630,100,000 3,505,800,000 3,525,400,000 3,572,100,000 3,541,400,000 3,584,300,000 3,729,500,000 3,498,824,000 3,490,121,000 3,165,828,000 2,881,256,000 2,666,219,000 2,569,798,000 2,436,522,000 2,290,453,000 2,163,831,000 2,357,634,000 2,368,827,000 950,521,000 1,011,674,000 961,997,000 1,004,127,000 1,001,353,000 948,726,000 926,768,000 935,231,000 949,511,000 956,148,000 925,049,000 866,301,000 850,118,000 821,441,000 832,510,000 831,053,000 844,106,000 810,067,000 844,955,000 847,045,000 814,363,000 819,502,000 846,166,000 850,179,000 811,095,000 787,324,000 795,917,000 808,747,000 792,404,000 793,974,000 662,764,000 651,824,000 634,659,000 626,967,000 631,421,000 634,148,000 631,084,000 588,848,000 551,982,000 531,486,000 507,057,000 507,215,000 495,301,000 516,738,000 561,070,000 605,678,000 654,608,000 646,446,000 615,281,000 666,027,000 648,147,000 634,836,000 606,117,000 613,569,000 542,244,000 536,249,000 507,930,000 500,798,000 456,880,000 390,099,000 384,851,000 387,339,000 
  prepaid expenses and other current assets251,900,000 271,000,000 276,400,000 318,700,000 295,700,000 286,800,000 225,400,000 231,900,000 239,100,000 217,800,000 205,993,000 162,068,000 177,061,000 154,536,000 137,811,000 114,670,000 162,312,000 171,099,000 187,910,000 166,044,000 157,276,000 192,375,000 76,076,000 80,940,000 72,284,000 62,406,000 52,107,000 90,415,000 81,078,000 68,889,000 40,189,000 71,795,000 137,146,000 122,438,000 48,583,000 127,839,000 141,957,000 131,906,000 48,420,000 167,287,000 160,985,000 138,652,000 54,274,000 107,989,000 108,768,000 140,191,000 49,278,000 59,981,000 39,114,000 30,292,000 44,728,000 26,109,000 24,031,000 22,680,000 23,297,000 27,263,000 27,737,000 21,554,000 20,165,000 18,506,000 16,998,000 12,977,000 13,077,000 13,748,000 14,346,000 9,896,000 10,015,000 12,061,000 13,219,000 11,152,000 10,059,000 10,187,000 10,241,000 8,808,000 9,068,000 9,554,000 9,535,000 7,631,000 7,898,000 10,614,000 9,383,000 9,410,000 9,451,000 
  total current assets9,243,600,000 8,686,800,000 8,351,400,000 8,683,500,000 8,536,100,000 8,912,800,000 8,391,600,000 8,611,400,000 8,583,400,000 8,448,100,000 8,330,539,000 7,897,087,000 7,606,475,000 6,878,969,000 6,350,111,000 6,215,496,000 5,995,747,000 5,575,140,000 5,506,978,000 5,597,450,000 5,438,386,000 2,777,478,000 2,540,411,000 2,578,480,000 2,584,864,000 2,513,750,000 2,385,640,000 2,506,499,000 2,446,940,000 2,418,671,000 2,408,849,000 2,410,127,000 2,305,545,000 2,203,360,000 2,172,457,000 2,243,827,000 2,306,637,000 2,274,442,000 2,257,534,000 2,366,090,000 2,368,050,000 2,313,461,000 2,350,338,000 2,450,037,000 2,408,541,000 2,259,899,000 2,198,541,000 2,218,670,000 2,194,656,000 2,176,694,000 2,101,837,000 1,905,925,000 1,836,151,000 1,794,406,000 1,737,420,000 1,761,888,000 1,704,759,000 1,633,735,000 1,513,686,000 1,517,812,000 1,415,752,000 1,391,482,000 1,331,004,000 1,357,848,000 1,379,774,000 1,432,936,000 1,557,663,000 1,765,993,000 1,743,017,000 1,637,155,000 1,680,499,000 1,713,397,000 1,670,473,000 1,617,519,000 1,618,012,000 1,120,212,000 1,017,571,000 938,824,000 908,863,000 1,013,280,000 777,521,000 779,565,000 854,916,000 
  property, buildings and equipment, net of accumulated depreciation of 602.1 and 554.1 in 2025 and 2024, respectively453,300,000                                                                                   
  operating lease assets844,900,000 775,800,000 735,100,000 747,600,000 762,400,000 768,300,000 761,200,000 696,500,000 681,700,000 660,100,000 625,082,000 575,159,000 570,062,000 564,738,000 530,863,000 540,173,000 510,513,000 519,311,000 534,705,000 540,142,000 549,762,000 271,602,000 235,834,000 237,252,000 233,403,000 232,989,000                                                          
  intangible assets1,815,100,000 1,829,100,000 1,835,900,000 1,811,200,000 1,816,400,000 1,831,000,000 1,857,600,000 1,874,900,000 1,902,000,000 1,921,500,000 1,943,400,000 1,853,451,000 1,888,911,000 1,922,265,000 1,944,141,000 1,977,841,000 2,020,538,000 2,045,992,000 2,065,495,000 2,078,468,000 2,095,480,000  287,275,000    316,016,000    367,104,000    393,362,000    403,649,000    429,840,000 452,140,000 475,708,000 449,180,000 439,167,000 457,621,000 461,552,000 481,750,000 496,761,000 204,572,000 150,964,000 154,130,000 156,874,000 150,018,000 153,452,000 156,886,000 160,307,000 75,790,000 77,625,000 79,467,000 81,308,000 83,146,000 84,984,000 86,774,000 88,689,000 90,578,000 92,425,000 94,271,000 133,791,000 137,181,000 140,618,000 144,007,000 147,550,000 79,134,000 81,082,000 81,987,000 83,892,000 50,695,000    
  goodwill3,351,700,000 3,299,800,000 3,280,100,000 3,217,700,000 3,203,100,000 3,182,500,000 3,262,300,000 3,237,700,000 3,266,600,000 3,244,800,000 3,240,931,000 3,123,430,000 3,190,677,000 3,222,538,000 3,208,333,000 3,201,688,000 3,223,511,000 3,199,494,000 3,187,169,000 3,118,818,000 3,107,256,000 1,717,963,000 1,759,040,000 1,746,071,000 1,752,800,000 1,740,771,000 1,722,603,000 1,755,292,000 1,744,694,000 1,755,679,000 1,771,877,000 1,776,918,000 1,741,540,000 1,725,547,000 1,720,714,000 1,735,662,000 1,740,156,000 1,762,693,000 1,681,662,000 1,666,218,000 1,713,118,000 1,675,581,000 1,735,440,000 1,759,833,000 1,790,853,000 1,752,112,000 1,734,391,000 1,762,331,000 1,741,407,000 1,762,914,000 1,777,797,000 1,127,001,000 1,021,106,000 1,022,726,000 1,008,127,000 987,358,000 992,637,000 991,838,000 985,714,000 876,533,000 876,873,000 866,002,000 863,410,000 863,339,000 863,173,000 863,010,000 862,778,000 857,760,000 857,839,000 855,833,000 924,358,000 906,492,000 905,742,000 902,540,000 931,229,000 550,338,000 550,830,000 547,724,000 542,217,000 557,957,000 401,575,000 401,591,000 401,610,000 
  deferred income taxes45,900,000 43,600,000 41,900,000 38,100,000 38,700,000 39,500,000 42,300,000 458,300,000 477,300,000 472,100,000 34,155,000 443,245,000 439,475,000 434,651,000 34,191,000 485,548,000 488,710,000 474,274,000 37,696,000 523,958,000 537,557,000 146,977,000 11,248,000 147,832,000 147,306,000 145,501,000 16,374,000 147,048,000 140,498,000 138,767,000 24,203,000 179,630,000 165,689,000 160,471,000 15,803,000 181,230,000 361,949,000 368,797,000 18,221,000 361,678,000 360,178,000 349,682,000 22,414,000 349,827,000 360,290,000 350,870,000 1,733,000 316,702,000 309,129,000 305,616,000 1,342,000 17,926,000 18,025,000 17,412,000 18,090,000 25,230,000 36,803,000 37,380,000 35,887,000 37,655,000 35,707,000 34,867,000 33,518,000 18,469,000 17,336,000 15,892,000 16,811,000 13,406,000 13,940,000 13,743,000 118,084,000 115,985,000 125,281,000 117,860,000 149,677,000 77,200,000 77,119,000 75,813,000 73,738,000 58,528,000 42,739,000 42,741,000 42,954,000 
  other assets448,000,000 434,200,000 374,100,000 335,200,000 314,000,000 311,200,000 322,300,000 337,000,000 317,700,000 294,600,000 234,905,000 259,354,000 236,689,000 219,930,000 171,048,000 176,005,000 164,538,000 147,093,000 93,941,000 133,239,000 138,058,000 12,288,000 2,379,000 17,656,000 20,118,000 19,987,000 3,525,000 25,845,000 25,281,000 29,301,000 6,990,000 41,679,000 40,957,000 40,450,000 31,041,000 61,548,000 61,879,000 64,438,000 59,620,000 49,424,000 49,823,000 50,787,000 33,680,000 52,065,000 54,079,000 54,615,000 44,622,000 38,944,000 39,149,000 40,720,000 41,169,000 23,572,000 23,242,000 24,072,000 24,391,000 13,448,000 12,018,000 12,653,000 13,135,000 13,105,000 12,292,000 12,674,000 24,687,000 13,690,000 12,023,000 11,547,000 29,562,000 29,966,000 30,708,000 31,368,000 17,120,000 18,185,000 19,110,000 19,482,000 20,176,000 13,644,000 12,078,000 12,629,000 13,104,000 13,733,000 5,484,000 4,903,000 5,587,000 
  total assets16,202,500,000 15,515,100,000 15,061,400,000 15,275,000,000 15,108,500,000 15,539,000,000 15,060,900,000 15,168,600,000 15,162,700,000 14,971,200,000 14,811,686,000 14,080,564,000 13,863,266,000 13,185,033,000 12,617,699,000 12,481,018,000 12,299,079,000 11,878,270,000 11,880,214,000 11,868,339,000 11,732,014,000 5,230,956,000 5,017,635,000 5,047,411,000 5,067,936,000 4,984,638,000 4,605,036,000 4,778,791,000 4,714,986,000 4,713,313,000 4,735,468,000 4,764,468,000 4,623,671,000 4,511,249,000 4,490,984,000 4,609,353,000 4,692,676,000 4,690,828,000 4,587,425,000 4,642,509,000 4,726,367,000 4,612,380,000 4,754,437,000 4,905,468,000 4,929,132,000 4,711,069,000 4,617,108,000 4,679,471,000 4,635,694,000 4,669,244,000 4,629,629,000 3,419,994,000 3,186,687,000 3,147,201,000 3,078,452,000 3,067,424,000 3,025,957,000 2,952,515,000 2,826,774,000 2,635,259,000 2,532,604,000 2,539,153,000 2,494,193,000 2,498,737,000 2,519,568,000 2,572,702,000 2,720,977,000 2,920,895,000 2,899,186,000 2,790,142,000 2,859,887,000 2,879,931,000 2,840,849,000 2,788,263,000 2,823,983,000 1,868,099,000 1,765,934,000 1,684,733,000 1,651,159,000 1,738,844,000 1,279,543,000 1,279,526,000 1,356,855,000 
  liabilities and stockholders’ equity                                                                                   
  current liabilities:                                                                                   
  accounts payable3,291,400,000 3,025,800,000 2,670,600,000 2,839,100,000 2,688,900,000 2,974,300,000 2,431,500,000 2,650,000,000 2,662,700,000 2,648,300,000 2,728,195,000 2,578,741,000 2,652,306,000 2,341,137,000 2,140,251,000 2,246,454,000 2,192,782,000 1,955,365,000 1,707,329,000 1,830,877,000 1,660,094,000 804,330,000 830,478,000 849,584,000 868,605,000 870,242,000 794,348,000 813,395,000 818,179,000 805,380,000 799,520,000 838,427,000 768,997,000 712,385,000 684,721,000 699,517,000 712,898,000 734,911,000 715,519,000 787,637,000 770,605,000 771,881,000 765,135,000 842,779,000 794,505,000 781,819,000 735,097,000 754,013,000 754,128,000 745,011,000 706,580,000 693,177,000 707,085,000 699,296,000 642,777,000 646,595,000 624,233,000 650,383,000 537,505,000 574,918,000 540,706,000 534,515,000 453,154,000 494,845,000 487,541,000 524,261,000 571,832,000 742,903,000 712,801,000 638,821,000 626,293,000 680,075,000 664,602,000 646,551,000 590,304,000 605,919,000 610,816,000 575,661,000 572,467,000 574,170,000 494,156,000 488,728,000 455,821,000 
  accrued payroll and benefit costs212,900,000 168,300,000 242,300,000 219,900,000 191,200,000 147,900,000 191,700,000 162,100,000 140,600,000 121,600,000 269,128,000 239,309,000 210,090,000 184,307,000 314,962,000 285,362,000 220,049,000 157,498,000 198,535,000 146,670,000 119,725,000 28,940,000 49,508,000 50,205,000 43,409,000 59,934,000 88,105,000 73,074,000 54,353,000 47,411,000 72,686,000 50,848,000 37,830,000 27,190,000 49,250,000 49,157,000 49,463,000 37,413,000 51,258,000 45,736,000 40,882,000 39,948,000 67,935,000 63,892,000 51,061,000 39,741,000 56,548,000 61,697,000 50,266,000 64,100,000 86,375,000 63,103,000 48,316,000 51,793,000 76,915,000 63,992,000 49,864,000 50,432,000 66,931,000 51,683,000 38,444,000 26,579,000 30,949,000 28,691,000 26,074,000 33,612,000 49,753,000 48,485,000 39,649,000 36,825,000 51,415,000 44,701,000 36,799,000 41,192,000 69,945,000 51,318,000 37,120,000 34,818,000 51,220,000 37,228,000 26,707,000 27,231,000 43,350,000 
  short-term debt and current portion of long-term debt27,300,000 21,000,000 19,500,000 14,900,000 13,800,000 11,100,000 8,600,000 14,700,000 9,200,000 7,600,000 70,471,000 69,295,000 70,628,000 70,263,000      28,844,000 27,696,000                                                               
  other current liabilities899,600,000 820,400,000 871,600,000 854,600,000 854,400,000 833,900,000 756,600,000 826,800,000 769,200,000 761,400,000 749,553,000 680,227,000 659,810,000 666,426,000 585,067,000 586,991,000 522,160,000 592,346,000 552,301,000 534,544,000 494,211,000 168,808,000 159,367,000 160,062,000 152,712,000 169,619,000 105,461,000 102,489,000 88,366,000 98,836,000 86,108,000 87,143,000 102,851,000 117,755,000 78,425,000 138,712,000 123,184,000 115,354,000 73,303,000 136,841,000 151,068,000 175,389,000 145,624,000 174,611,000 221,383,000 219,432,000 174,990,000 178,412,000 192,391,000 189,526,000 134,622,000 71,090,000 73,792,000 66,364,000 72,254,000 61,766,000 65,219,000 67,247,000 67,626,000 77,966,000 72,943,000 59,697,000 63,262,000 60,842,000 59,998,000 50,271,000 53,718,000 57,055,000 48,917,000 64,837,000 49,008,000 74,762,000 58,031,000 63,154,000 65,710,000 50,354,000 40,323,000 48,408,000 38,499,000 46,298,000 30,144,000 34,831,000 32,647,000 
  total current liabilities4,431,200,000 4,035,500,000 3,804,000,000 3,928,500,000 3,748,300,000 4,035,900,000 3,388,400,000 3,653,600,000 3,581,700,000 3,538,900,000 3,817,347,000 3,567,572,000 3,592,834,000 3,262,133,000 3,049,808,000 3,138,099,000 3,301,956,000 2,726,011,000 2,986,995,000 2,540,935,000 2,301,726,000 1,040,505,000 1,084,059,000 1,104,524,000 1,124,832,000 1,150,722,000 1,061,946,000 1,051,528,000 1,025,909,000 1,021,601,000 1,040,969,000 1,043,493,000 964,406,000 920,069,000 896,797,000 959,982,000 970,947,000 983,302,000 947,801,000 1,016,777,000 1,011,711,000 1,039,112,000 1,063,872,000 1,126,681,000 1,114,367,000 1,086,172,000 1,044,589,000 1,036,811,000 1,041,014,000 1,038,727,000 1,007,995,000 910,036,000 894,505,000 878,171,000 845,846,000 822,741,000 776,616,000 806,755,000 708,233,000 834,844,000 778,313,000 749,848,000 680,834,000 609,225,000 600,266,000 876,877,000 1,006,009,000 1,411,010,000 1,344,095,000 1,274,560,000 1,291,925,000 1,362,284,000 1,290,101,000 1,243,585,000 1,153,672,000 734,506,000 698,554,000 698,856,000 719,886,000 877,875,000 573,472,000 583,235,000 564,245,000 
  long-term debt, net of debt discount and debt issuance costs of 54.5 and 47.2 in 2025 and 2024, respectively5,641,200,000                                                                                   
  operating lease liabilities719,000,000 655,700,000 614,800,000 624,600,000 639,300,000 643,500,000 641,700,000 575,400,000 559,300,000 540,500,000 510,433,000 455,356,000 449,684,000 445,867,000 414,248,000 421,831,000 391,608,000 399,758,000 414,889,000 419,718,000 430,273,000 213,172,000 179,830,000 182,044,000 177,907,000 178,606,000                                                          
  other noncurrent liabilities241,800,000 239,500,000 216,000,000 236,900,000 223,700,000 237,200,000 233,900,000 220,500,000 221,000,000 234,900,000 227,615,000 229,629,000 230,109,000 238,246,000 238,446,000 287,951,000 288,680,000 285,790,000 278,010,000 292,380,000 293,508,000 85,574,000 91,391,000 79,968,000 83,582,000 99,171,000 102,086,000 119,064,000 121,119,000 127,937,000 128,237,000 65,811,000 63,928,000 63,426,000 63,031,000 56,800,000 56,548,000 54,020,000 44,154,000 49,501,000 51,733,000 49,387,000 49,227,000 48,541,000 44,013,000 42,882,000 43,471,000 52,169,000 70,489,000 72,718,000 72,060,000 24,495,000 24,592,000 24,356,000 20,769,000 19,849,000 21,521,000 30,996,000 33,178,000 30,693,000 28,639,000 28,138,000 28,133,000 27,643,000 25,585,000 23,299,000 20,585,000 28,571,000 30,158,000 29,739,000 30,091,000 28,293,000 27,882,000 26,387,000 13,520,000 12,396,000 11,337,000 10,561,000 9,507,000 10,150,000 8,828,000 9,425,000 7,904,000 
  total liabilities11,447,500,000 10,485,000,000 10,095,900,000 10,238,200,000 10,257,200,000 10,561,200,000 10,029,000,000 10,286,100,000 10,362,400,000 10,381,500,000 10,362,114,000 9,888,618,000 9,751,959,000 9,217,555,000 8,841,488,000 8,899,201,000 8,774,078,000 8,478,567,000 8,543,825,000 8,655,115,000 8,631,613,000 3,028,830,000 2,758,964,000 2,860,701,000 2,933,113,000 2,788,276,000 2,475,310,000 2,546,954,000 2,549,231,000 2,580,399,000 2,619,325,000 2,657,235,000 2,528,565,000 2,453,766,000 2,480,972,000 2,616,720,000 2,750,102,000 2,797,346,000 2,813,554,000 2,882,661,000 2,860,424,000 2,775,062,000 2,826,272,000 2,996,823,000 3,039,630,000 2,937,510,000 2,852,317,000 2,941,146,000 2,993,047,000 3,051,874,000 3,075,938,000 1,875,464,000 1,718,221,000 1,736,022,000 1,732,542,000 1,783,917,000 1,772,650,000 1,753,291,000 1,678,180,000 1,539,962,000 1,481,250,000 1,511,908,000 1,497,904,000 1,537,326,000 1,697,974,000 1,797,007,000 1,988,981,000 2,203,879,000 2,229,758,000 2,161,503 2,251,411,000 2,308,138,000 2,281,749,000 2,165,070,000 2,060,756,000 1,172,918,000 1,136,132,000 1,137,040,000 1,159,709,000 1,299,220,000 873,800,000 904,493,000 1,003,302,000 
  commitments and contingencies                                                                                   
  stockholders’ equity:                                                                                   
  preferred stock, .01 par value; 20,000,000 shares authorized, no shares issued or outstanding                                                                                   
  preferred stock, series a, .01 par value; 25,000 shares authorized, no shares issued or outstanding in 2025, 21,612 shares issued and outstanding in 2024                                                                                   
  common stock700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 700,000 685,000 685,000 694,000 684,000 682,000 681,000 680,000 678,000 676,000 676,000 676,000 594,000 593,000 593,000 593,000 593,000 592,000 592,000 591,000 591,000 591,000 590,000 590,000 590,000 588,000 588,000 586,000 586,000 586,000 586,000 586,000 585,000 584,000 584,000 584,000 583,000 581,000 580,000 579,000 580,000 579,000 575,000 574,000 572,000 571,000 569,000 569,000 567,000 566,000 561,000 560,000 560,000 560,000 558,000 558,000 558,000 557,000 556,000 556,000 549,000 546,000 546,000 546,000 545,000 538,000 533,000 531,000 524,000 518,000 513,000 511,000 510,000 505,000 
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2025 and 2024, respectively                                                                                   
  additional capital1,484,800,000 2,049,500,000 2,051,600,000 2,042,400,000 2,035,500,000 2,032,900,000 2,037,100,000 2,023,900,000 2,015,500,000 2,003,300,000 2,005,442,000 1,993,709,000 1,985,967,000 1,970,401,000 1,969,332,000 1,961,369,000 1,953,653,000 1,946,517,000 1,942,810,000 1,939,101,000 1,933,241,000 1,041,637,000 1,039,347,000 1,034,888,000 998,218,000 1,015,563,000 993,666,000 1,006,222,000 1,005,897,000 1,001,794,000 999,156,000 995,670,000 991,750,000 987,909,000 986,020,000 984,856,000 1,119,940,000 1,118,869,000 1,117,421,000 1,114,299,000 1,110,716,000 1,100,068,000 1,102,369,000 1,098,458,000 1,095,866,000 1,090,627,000 1,082,772,000 1,078,817,000 1,074,860,000 1,070,043,000 1,065,550,000 1,053,493,000 1,049,523,000 1,042,620,000 1,036,867,000 1,031,747,000 1,028,750,000 1,024,303,000 1,018,683,000 1,005,730,000 1,001,211,000 997,237,000 992,855,000 987,621,000 892,805,000 889,353,000 842,537,000 837,246,000 833,972,000 815,759,000 808,739,000 804,332,000 799,484,000 793,614,000 769,948,000 755,894,000 749,158,000 723,557,000 707,407,000 696,347,000 690,852,000 687,333,000 676,465,000 
  retained earnings5,205,000,000 5,037,800,000 4,960,700,000 4,829,800,000 4,660,100,000 4,462,600,000 4,391,700,000 4,283,500,000 4,093,400,000 3,933,000,000 3,794,965,000 3,590,688,000 3,370,936,000 3,163,445,000 3,004,690,000 2,851,747,000 2,750,665,000 2,645,871,000 2,601,662,000 2,596,022,000 2,529,842,000 2,565,597,000 2,530,429,000 2,477,259,000 2,412,768,000 2,349,300,000 2,307,462,000 2,249,327,000 2,182,484,000 2,124,535,000 2,079,697,000 2,056,961,000 2,044,719,000 1,994,617,000 1,956,532,000 1,909,189,000 1,940,767,000 1,890,967,000 1,854,456,000 1,806,052,000 1,742,549,000 1,690,808,000 1,643,914,000 1,569,531,000 1,488,722,000 1,419,919,000 1,368,386,000 1,310,393,000 1,241,987,000 1,176,708,000 1,092,719,000 1,066,216,000 1,003,641,000 944,767,000 891,789,000 836,940,000 783,050,000 734,981,000 697,676,000 662,853,000 629,193,000 601,399,000 582,199,000 560,446,000 526,827,000 500,373,000 497,485,000 455,619,000 389,751,000 329,624,000 284,794,000 223,761,000 151,987,000 92,320,000 48,988,000   -123,882,000  -208,067,000 -233,075,000 -260,514,000 -271,858,000 
  treasury stock-1,546,800,000 -1,521,300,000 -1,495,100,000 -1,440,700,000 -1,415,400,000 -1,111,800,000 -1,060,400,000 -1,035,900,000 -984,500,000 -982,000,000 -969,150,000 -957,805,000 -957,083,000 -956,775,000 -956,188,000 -950,004,000 -947,698,000 -939,756,000 -938,335,000 -937,520,000 -937,515,000 -937,078,000 -937,157,000 -937,135,000 -904,873,000 -777,216,000 -758,018,000 -669,212,000 -647,843,000 -647,613,000 -647,158,000 -647,138,000 -596,659,000 -546,934,000 -542,537,000 -541,706,000 -771,830,000 -771,760,000 -772,679,000 -772,659,000 -695,959,000 -637,755,000 -616,366,000 -616,075,000 -615,609,000 -614,502,000 -610,430,000 -607,273,000 -606,012,000 -605,478,000 -604,050,000 -600,059,000 -598,949,000 -595,944,000 -593,329,000 -591,740,000 -591,464,000 -591,289,000 -591,007,000 -590,602,000 -590,464,000 -590,383,000 -590,353,000 -590,319,000 -590,306,000 -590,288,000 -590,288,000 -590,330,000 -576,293,000 -536,411,000 -511,478,000 -480,773,000 -415,252,000 -277,862,000 -70,820,000 -68,599,000 -67,769,000 -66,323,000 -61,821,000 -61,654,000 -61,630,000 -61,630,000 -61,449,000 
  accumulated other comprehensive loss-381,500,000 -531,400,000 -547,200,000 -389,800,000 -423,600,000 -401,700,000 -332,000,000 -384,000,000 -319,500,000 -360,700,000 -377,751,000 -430,500,000 -283,768,000 -204,395,000 -236,035,000 -275,351,000 -225,074,000 -246,293,000 -263,134,000 -377,461,000 -418,889,000 -461,623,000 -367,772,000 -382,530,000 -365,674,000 -385,918,000 -408,435,000 -349,619,000 -370,105,000 -341,390,000 -312,590,000 -295,622,000 -342,164,000 -375,545,000 -387,365,000 -356,659,000 -342,666,000 -340,901,000  -385,526,000 -290,164,000 -315,706,000                                          
  total wesco international, inc. stockholders’ equity4,762,200,000 5,035,300,000 4,970,700,000 5,042,400,000 4,857,300,000 4,982,700,000                                                                              
  noncontrolling interests-7,200,000 -5,200,000 -5,200,000 -5,600,000 -6,000,000 -4,900,000 -5,200,000 -5,700,000 -5,300,000 -4,600,000 -4,662,000 -4,874,000 -5,482,000 -5,925,000 -6,313,000 -6,668,000 -7,268,000 -7,357,000 -7,333,000 -7,637,000 -6,997,000 -7,044,000 -6,812,000 -6,408,000 -6,252,000 -6,003,000 -5,584,000 -5,516,000 -5,312,000 -5,046,000 -3,596,000 -3,271,000 -3,173,000 -3,197,000 -3,269,000 -3,678,000 -4,266,000 -4,322,000  -2,947,000                                            
  total stockholders’ equity4,755,000,000 5,030,100,000 4,965,500,000 5,036,800,000 4,851,300,000 4,977,800,000 5,031,900,000 4,882,500,000 4,800,300,000 4,589,700,000 4,449,572,000 4,191,946,000 4,111,307,000 3,967,478,000 3,776,211,000 3,581,817,000 3,525,001,000 3,399,703,000 3,336,389,000 3,213,224,000 3,100,401,000 2,202,126,000 2,258,671,000 2,186,710,000 2,134,823,000 2,196,362,000 2,129,726,000 2,231,837,000 2,165,755,000 2,132,914,000 2,116,143,000 2,107,233,000 2,095,106,000 2,057,483,000 2,010,012,000 1,992,633,000 1,942,574,000 1,893,482,000 1,773,871,000 1,759,848,000 1,865,943,000 1,837,318,000 1,928,165,000 1,908,645,000 1,889,502,000 1,773,559,000 1,764,791,000 1,738,325,000 1,642,647,000 1,617,370,000 1,553,691,000 1,544,530,000 1,468,466,000 1,411,179,000 1,345,910,000 1,283,507,000 1,253,307,000 1,199,224,000 1,148,594,000 1,095,297,000 1,051,354,000 1,027,245,000 996,289,000 961,411,000 821,594,000 775,695,000 731,996,000 717,016,000 669,428,000 628,639,000 608,476,000 571,793,000 559,100,000 623,193,000 763,227,000 695,181,000 629,802,000 547,693,000 491,450,000 439,624,000 405,743,000 375,033,000 353,553,000 
  total liabilities and stockholders’ equity16,202,500,000 15,515,100,000 15,061,400,000 15,275,000,000 15,108,500,000 15,539,000,000 15,060,900,000 15,168,600,000 15,162,700,000 14,971,200,000 14,811,686,000 14,080,564,000 13,863,266,000 13,185,033,000 12,617,699,000 12,481,018,000 12,299,079,000 11,878,270,000 11,880,214,000 11,868,339,000 11,732,014,000 5,230,956,000 5,017,635,000 5,047,411,000 5,067,936,000 4,984,638,000 4,605,036,000 4,778,791,000 4,714,986,000 4,713,313,000 4,735,468,000 4,764,468,000 4,623,671,000 4,511,249,000 4,490,984,000 4,609,353,000 4,692,676,000 4,690,828,000 4,587,425,000 4,642,509,000 4,726,367,000 4,612,380,000 4,754,437,000 4,905,468,000 4,929,132,000 4,711,069,000 4,617,108,000 4,679,471,000 4,635,694,000 4,669,244,000 4,629,629,000 3,419,994,000 3,186,687,000 3,147,201,000 3,078,452,000 3,067,424,000 3,025,957,000 2,952,515,000 2,826,774,000 2,635,259,000 2,532,604,000 2,539,153,000 2,494,193,000 2,498,737,000 2,519,568,000 2,572,702,000 2,720,977,000 2,920,895,000 2,899,186,000 2,790,142,000 2,859,887,000 2,879,931,000 2,840,849,000 2,788,263,000 2,823,983,000 1,868,099,000 1,765,934,000 1,684,733,000 1,651,159,000 1,738,844,000 1,279,543,000 1,279,526,000 1,356,855,000 
  trade accounts receivable, net of allowance for expected credit losses of 62.6 and 55.0 in 2025 and 2024, respectively 3,641,300,000                                                                                  
  property, buildings and equipment, net of accumulated depreciation of 574.5 and 554.1 in 2025 and 2024, respectively 445,800,000                                                                                  
  long-term debt, net of debt discount and debt issuance costs of 57.9 and 47.2 in 2025 and 2024, respectively 5,136,600,000                                                                                  
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2025 and 2024                                                                                   
  assets                                                                                   
  trade accounts receivable, net of allowance for expected credit losses of 55.0 and 55.9 in 2024 and 2023, respectively  3,454,400,000                                                                                 
  property, buildings and equipment  442,900,000    423,600,000    402,674,000    379,012,000    399,157,000    181,448,000    160,878,000    156,445,000    157,607,000    166,739,000    182,725,000    198,654,000    210,723,000   134,455,000 133,550,000 129,482,000 126,288,000 120,023,000 118,045,000 114,364,000 114,355,000 114,615,000 116,309,000 117,705,000 117,166,000 116,859,000 119,223,000 116,381,000 113,470,000 110,505,000 104,119,000 104,676,000 104,906,000 104,715,000 107,016,000 104,771,000 104,373,000 103,569,000 103,083,000 103,179,000 94,963,000 93,467,000 94,742,000 
  long-term debt, net of debt discount and debt issuance costs of 47.2 and 43.0 in 2024 and 2023, respectively  5,045,500,000                                                                                 
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2024 and 2023, respectively                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2024 and 2023, respectively                                                                                   
  trade accounts receivable, net of allowance for expected credit losses of 61.0 and 55.9 in 2024 and 2023, respectively   3,629,100,000                                                                                
  property, buildings and equipment, net of accumulated depreciation of 532.8 and 502.5 in 2024 and 2023, respectively   441,700,000                                                                                
  long-term debt, net of debt discount and debt issuance costs of 50.6 and 43.0 in 2024 and 2023, respectively   5,007,800,000                                                                                
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2024 and 2023                                                                                   
  trade accounts receivable, net of allowance for expected credit losses of 59.0 and 55.9 in 2024 and 2023, respectively    3,654,600,000                                                                               
  property, buildings and equipment, net of accumulated depreciation of 514.1 and 502.5 in 2024 and 2023, respectively    437,800,000                                                                               
  long-term debt, net of debt discount and debt issuance costs of 54.0 and 43.0 in 2024 and 2023, respectively    5,203,400,000                                                                               
  trade accounts receivable, net of allowance for expected credit losses of 57.0 and 55.9 in 2024 and 2023, respectively     3,526,700,000                                                                              
  current assets held for sale     243,600,000                                                                              
  property, buildings and equipment, net of accumulated depreciation of 505.8 and 502.5 in 2024 and 2023, respectively     428,100,000                                                                              
  noncurrent assets held for sale     65,600,000                                                                              
  current liabilities held for sale     68,700,000                                                                              
  long-term debt, net of debt discount and debt issuance costs of 65.5 and 43.0 in 2024 and 2023, respectively     5,183,800,000                                                                              
  noncurrent liabilities held for sale     3,100,000                                                                              
  trade accounts receivable, net of allowance for expected credit losses of 55.9 and 46.5 in 2023 and 2022, respectively      3,639,500,000                                                                             
  long-term debt, net of debt discount and debt issuance costs of 43.0 and 57.9 in 2023 and 2022, respectively      5,313,100,000                                                                             
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2023 and 2022, respectively                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2023 and 2022, respectively                                                                                   
  total wesco international, inc. stockholders' equity      5,037,100,000 4,888,200,000 4,805,600,000 4,594,300,000 4,454,234,000 4,196,820,000 4,116,789,000 3,973,403,000 3,782,524,000 3,588,485,000 3,532,269,000 3,407,060,000 3,343,722,000 3,220,861,000 3,107,398,000 2,209,170,000 2,265,483,000 2,193,118,000 2,141,075,000 2,202,365,000 2,135,310,000 2,237,353,000 2,171,067,000 2,137,960,000 2,119,739,000 2,110,504,000 2,098,279,000 2,060,680,000 2,013,281,000 1,996,311,000 1,946,840,000 1,897,804,000  1,762,795,000 1,867,771,000                                           
  trade accounts receivable, net of allowance for expected credit losses of 58.4 and 46.5 in 2023 and 2022, respectively       3,795,000,000                                                                            
  property, buildings and equipment, net of accumulated depreciation of 484.7 and 425.8 in 2023 and 2022, respectively       411,100,000                                                                            
  long-term debt, net of debt discount and debt issuance costs of 46.8 and 57.9 in 2023 and 2022, respectively       5,378,300,000                                                                            
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2023 and 2022                                                                                   
  trade accounts receivable, net of allowance for expected credit losses of 57.5 and 46.5 in 2023 and 2022, respectively        3,850,700,000                                                                           
  property, buildings and equipment, net of accumulated depreciation of 473.0 and 425.8 in 2023 and 2022, respectively        411,300,000                                                                           
  long-term debt, net of debt discount and debt issuance costs of 50.5 and 57.9 in 2023 and 2022, respectively        5,523,100,000                                                                           
  trade accounts receivable, net of allowance for expected credit losses of 52.5 and 46.5 in 2023 and 2022, respectively         3,807,400,000                                                                          
  property, buildings and equipment, net of accumulated depreciation of 452.9 and 425.8 in 2023 and 2022, respectively         402,100,000                                                                          
  long-term debt, net of debt discount and debt issuance costs of 54.2 and 57.9 in 2023 and 2022, respectively         5,595,100,000                                                                          
  trade accounts receivable, net of allowance for expected credit losses of 46,525 and 41,723 in 2022 and 2021, respectively          3,662,663,000                                                                         
  long-term debt, net of debt discount and debt issuance costs of 57,943 and 70,572 in 2022 and 2021, respectively          5,345,973,000                                                                         
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2022 and 2021, respectively                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2022 and 2021, respectively          43,000 43,000 43,000 43,000                                                                      
  trade accounts receivable, net of allowance for expected credit losses of 46,663 and 41,723 in 2022 and 2021, respectively           3,622,067,000                                                                        
  property, buildings and equipment, net of accumulated depreciation of 406,960 and 365,345 in 2022 and 2021, respectively           372,083,000                                                                        
  long-term debt, net of debt discount and debt issuance costs of 60,765 and 70,572 in 2022 and 2021, respectively           5,192,816,000                                                                        
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2022 and 2021                                                                                   
  trade accounts receivable, net of allowance for expected credit losses of 46,591 and 41,723 in 2022 and 2021, respectively            3,635,840,000                                                                       
  property, buildings and equipment, net of accumulated depreciation of 395,776 and 365,345 in 2022 and 2021, respectively            370,452,000                                                                       
  long-term debt, net of debt discount and debt issuance costs of 64,059 and 70,572 in 2022 and 2021, respectively            5,039,857,000                                                                       
  trade accounts receivable, net of allowance for expected credit losses of 42,870 and 41,723 in 2022 and 2021, respectively             3,283,522,000                                                                      
  property, buildings and equipment, net of accumulated depreciation of 382,507 and 365,345 in 2022 and 2021, respectively             376,593,000                                                                      
  long-term debt, net of debt discount and debt issuance costs of 67,715 and 70,572 in 2022 and 2021, respectively             4,836,658,000                                                                      
  trade accounts receivable, net of allowance for expected credit losses of 41,723 and 23,909 in 2021 and 2020, respectively              2,957,613,000                                                                     
  other receivables              375,885,000                                                                     
  assets held for sale                  55,073,000                                                                 
  short-term debt and current portion of long-term debt, net of debt issuance costs of 1,039 in 2020              9,528,000 19,292,000  20,802,000 528,830,000                                                                 
  long-term debt, net of debt discount and debt issuance costs of 70,572 and 87,142 in 2021 and 2020, respectively              4,701,542,000                                                                     
  liabilities held for sale                  5,717,000                                                                 
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2021 and 2020, respectively                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2021 and 2020, respectively              43,000 43,000 43,000 43,000                                                                  
  trade accounts receivable, net of allowance for expected credit losses of 38,550 and 23,909 in 2021 and 2020, respectively               2,955,632,000                                                                    
  property, buildings and equipment, net of accumulated depreciation of 352,586 and 312,106 in 2021 and 2020, respectively               369,815,000                                                                    
  long-term debt, net of debt discount and debt issuance costs of 74,222 and 87,142 in 2021 and 2020, respectively               4,565,772,000                                                                    
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2021 and 2020                                                                                   
  trade accounts receivable, net of allowance for expected credit losses of 36,288 and 23,909 in 2021 and 2020, respectively                2,842,187,000                                                                   
  property, buildings and equipment, net of accumulated depreciation of 339,295 and 312,106 in 2021 and 2020, respectively                384,232,000                                                                   
  short-term debt and current portion of long-term debt, net of debt issuance costs of 2,217 and 1,039 in 2021 and 2020, respectively                366,965,000                                                                   
  long-term debt, net of debt discount and debt issuance costs of 78,278 and 87,142 in 2021 and 2020, respectively                4,303,124,000                                                                   
  trade accounts receivable, net of allowance for expected credit losses of 28,333 and 23,909 in 2021 and 2020, respectively                 2,574,803,000                                                                  
  property, buildings and equipment, net of accumulated depreciation of 323,819 and 312,106 in 2021 and 2020, respectively                 391,240,000                                                                  
  long-term debt, net of debt discount and debt issuance costs of 83,627 and 87,142 in 2021 and 2020, respectively                 4,592,734,000                                                                  
  trade accounts receivable, net of allowance for expected credit losses of 23,909 and 25,443 in 2020 and 2019, respectively                  2,466,903,000                                                                 
  long-term debt, net of debt discount and debt issuance costs of 87,142 and 8,876 in 2020 and 2019, respectively                  4,369,953,000                                                                 
  preferred stock, series a, .01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2020                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2020 and 2019, respectively                  43,000 43,000 43,000 43,000                                                              
  trade accounts receivable, net of allowance for expected credit losses of 26,220 and 25,443 in 2020 and 2019, respectively                   2,492,248,000                                                                
  property, buildings and equipment, net of accumulated depreciation of 294,638 and 268,415 in 2020 and 2019, respectively                   400,222,000                                                                
  long-term debt, net of debt discount and debt issuance costs of 92,343 and 8,876 in 2020 and 2019, respectively                   4,878,124,000                                                                
  trade accounts receivable, net of allowance for expected credit losses of 24,590 and 25,443 in 2020 and 2019, respectively                    2,454,262,000                                                               
  property, buildings and equipment, net of accumulated depreciation of 278,916 and 268,415 in 2020 and 2019, respectively                    403,072,000                                                               
  long-term debt, net of debt discount and debt issuance costs of 96,322 and 8,876 in 2020 and 2019, respectively                    5,068,549,000                                                               
  trade accounts receivable, net of allowance for doubtful accounts of 25,260 and 25,443 in 2020 and 2019, respectively                     1,214,331,000                                                              
  property, buildings and equipment, net of accumulated depreciation of 269,582 and 268,415 in 2020 and 2019, respectively                     183,997,000                                                              
  intangible assets, net of accumulated amortization of 278,711 and 280,442 in 2020 and 2019, respectively                     267,628,000                                                              
  short-term debt                     24,097,000 26,255,000 25,561,000 27,217,000 27,313,000 30,785,000 31,125,000 35,527,000 41,692,000 34,075,000 39,712,000 23,972,000 28,037,000 20,920,000 35,562,000 43,494,000 48,251,000 43,314,000 44,419,000 46,924,000 49,663,000 46,787,000 43,006,000 44,962,000 42,722,000 37,551,000 32,428,000 33,871,000 30,390,000 30,136,000 22,848,000 19,409,000 12,734,000            245,000,000 295,000,000 525,000,000 500,000,000 486,000,000 502,300,000 500,000,000 495,500,000 465,000,000 390,500,000    14,500,000     
  current portion of long-term debt                     379,000      1,179,000 1,188,000 1,210,000 1,224,000 1,213,000 1,221,000 1,244,000 1,218,000 1,220,000 1,239,000 1,238,000 1,025,000 2,144,000 2,232,000 2,231,000 2,343,000 2,393,000 2,456,000 2,458,000 2,510,000 9,581,000 9,602,000 9,700,000 9,623,000 2,137,000 2,037,000 2,482,000 6,411,000 5,206,000 4,775,000 4,836,000 3,988,000 96,673,000 95,975,000 94,749,000 93,977,000 3,897,000 3,872,000 3,847,000 3,823,000 2,765,000 2,730,000 2,706,000 2,676,000 2,654,000 2,632,000 2,611,000 5,927,000 5,856,000 5,663,000 26,190,000 36,825,000 219,166,000 21,452,000 31,432,000 31,413,000 
  bank overdrafts                     13,951,000 18,021,000 18,774,000 32,493,000 22,455,000 17,818,000 30,266,000 28,296,000 27,072,000 37,644,000 26,150,000 29,535,000 33,458,000 29,384,000 35,814,000 40,669,000 46,135,000 34,170,000    36,048,000    37,718,000    39,641,000 57,681,000 43,866,000 45,502,000 47,489,000 40,589,000 27,917,000 29,250,000 27,590,000 25,645,000 22,530,000 26,796,000 32,191,000 19,245,000 21,180,000 18,419,000 30,367,000 33,709,000 39,812,000 44,087,000 58,948,000 58,634,000 31,204,000 23,744,000 27,833,000 17,123,000  5,599,000 3,695,000     
  long-term debt, net of debt issuance costs of 8,211 and 8,876 in 2020 and 2019, respectively                     1,542,602,000                                                              
  trade accounts receivable, net of allowance for doubtful accounts of 25,443 and 24,468                                                                                   
  in 2019 and 2018, respectively                      1,187,359,000                                                             
  income taxes receivable                      16,371,000    24,873,000    23,250,000    72,881,000    73,814,000    56,162,000    18,426,000   11,953,000 8,849,000 11,284,000 11,794,000 11,885,000 12,206,000 17,097,000 15,856,000 18,193,000 18,146,000 23,006,000 22,174,000 21,645,000 29,135,000 24,299,000 21,812,000 20,751,000 18,661,000 22,278,000 19,195,000 17,916,000 38,793,000 22,350,000 22,344,000 21,454,000 34,016,000  10,287,000 7,792,000 12,814,000 13,038,000 2,692,000 7,627,000 6,082,000 
  current portion of long-term debt, net of debt discount and debt issuance costs of 488 in 2018                      430,000 338,000 396,000 1,159,000                                                          
  long-term debt, net of debt discount and debt issuance costs of 8,876 and 9,243 in 2019 and 2018, respectively                      1,257,067,000                                                             
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2019 and 2018, respectively                      43,000 43,000 43,000 43,000                                                          
  trade accounts receivable, net of allowance for doubtful accounts of 27,122 and 24,468 in 2019 and 2018, respectively                       1,315,026,000                                                            
  property, buildings and equipment, net of accumulated depreciation of 289,882 and 291,811 in 2019 and 2018, respectively                       174,459,000                                                            
  intangible assets, net of accumulated amortization of 278,856 and 249,539 in 2019 and 2018, respectively                       293,493,000                                                            
  long-term debt, net of debt discount and debt issuance costs of 9,371 and 9,243 in 2019 and 2018, respectively                       1,346,333,000                                                            
  trade accounts receivable, net of allowance for doubtful accounts of 25,821 and 24,468 in 2019 and 2018, respectively                        1,355,541,000                                                           
  property, buildings and equipment, net of accumulated depreciation of 293,076 and 291,811 in 2019 and 2018, respectively                        172,359,000                                                           
  intangible assets, net of accumulated amortization of 271,598 and 249,539 in 2019 and 2018, respectively                        304,392,000                                                           
  long-term debt, net of debt discount and debt issuance costs of 7,773 and 9,243 in 2019 and 2018, respectively                        1,399,486,000                                                           
  trade accounts receivable, net of allowance for doubtful accounts of 26,828 and 24,468 in 2019 and 2018, respectively                         1,268,565,000                                                          
  property, buildings and equipment, net of accumulated depreciation of 290,883 and 291,811 in 2019 and 2018, respectively                         166,688,000                                                          
  intangible assets, net of accumulated amortization of 260,496 and 249,539 in 2019 and 2018, respectively                         310,453,000                                                          
  long-term debt, net of debt discount and debt issuance costs of 8,508 and 9,243 in 2019 and 2018, respectively                         1,214,276,000                                                          
  trade accounts receivable, net of allowance for doubtful accounts of 24,468 and 21,313                                                                                   
  in 2018 and 2017, respectively                          1,166,607,000                                                         
  current portion of long-term debt, net of debt discount and debt issuance costs                                                                                   
  of 488 in 2018                          25,429,000                                                         
  long-term debt, net of debt discount and debt issuance costs of 9,243 and 14,224                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2018 and 2017, respectively                          43,000 43,000 43,000 43,000                                                      
  trade accounts receivable, net of allowance for doubtful accounts of 25,272 and 21,313 in 2018 and 2017, respectively                           1,265,880,000                                                        
  property, buildings and equipment, net of accumulated depreciation of 289,273 and 278,455 in 2018 and 2017, respectively                           157,129,000                                                        
  intangible assets, net of accumulated amortization of 248,797 and 223,554 in 2018 and 2017, respectively                           334,026,000                                                        
  long-term debt, net of debt discount and debt issuance costs of 10,596 and 14,224 in 2018 and 2017, respectively                           1,229,314,000                                                        
  trade accounts receivable, net of allowance for doubtful accounts of 22,763 and 21,313 in 2018 and 2017, respectively                            1,257,330,000                                                       
  property, buildings and equipment, net of accumulated depreciation of 285,632 and 278,455 in 2018 and 2017, respectively                            157,492,000                                                       
  intangible assets, net of accumulated amortization of 237,716 and 223,554 in 2018 and 2017, respectively                            340,579,000                                                       
  long-term debt, net of debt discount and debt issuance costs of 11,441 and 14,224 in 2018 and 2017, respectively                            1,261,705,000                                                       
  trade accounts receivable, net of allowance for doubtful accounts of 22,979 and 21,313 in 2018 and 2017, respectively                             1,205,046,000                                                      
  property, buildings and equipment, net of accumulated depreciation of 281,818 and 278,455 in 2018 and 2017, respectively                             156,364,000                                                      
  intangible assets, net of accumulated amortization of 73,824 and 66,800 in 2018 and 2017, respectively                             353,298,000                                                      
  long-term debt, net of debt discount and debt issuance costs of 13,234 and 14,224 in 2018 and 2017, respectively                             1,292,094,000                                                      
  trade accounts receivable, net of allowance for doubtful accounts of 21,313 and 22,007                                                                                   
  in 2017 and 2016, respectively                              1,170,080,000                                                     
  income taxes payable                              9,712,000    32,879,000    29,212,000                                             
  long-term debt, net of debt discount and debt issuance costs of 14,224 and 17,278                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2017 and 2016, respectively                              43,000 43,000 43,000 43,000                                                  
  trade accounts receivable, net of allowance for doubtful accounts of 24,240 and 22,007 in 2017 and 2016, respectively                               1,236,612,000                                                    
  property, buildings and equipment, net of accumulated depreciation of 274,643 and 259,126 in 2017 and 2016, respectively                               157,591,000                                                    
  intangible assets, net of accumulated amortization of 214,225 and 178,813 in 2017 and 2016, respectively                               378,153,000                                                    
  long-term debt, net of debt discount and debt issuance costs of 14,302 and 17,278 in 2017 and 2016, respectively                               1,368,301,000                                                    
  trade accounts receivable, net of allowance for doubtful accounts of 23,061 and 22,007 in 2017 and 2016, respectively                                1,144,978,000                                                   
  property, buildings and equipment, net of accumulated depreciation of 268,723 and 259,126 in 2017 and 2016, respectively                                155,203,000                                                   
  intangible assets, net of accumulated amortization of 200,755 and 178,813 in 2017 and 2016, respectively                                380,426,000                                                   
  long-term debt, net of debt discount and debt issuance costs of 15,291 and 17,278 in 2017 and 2016, respectively                                1,334,542,000                                                   
  trade accounts receivable, net of allowance for doubtful accounts of 23,475 and 22,007 in 2017 and 2016, respectively                                 1,060,574,000                                                  
  property, buildings and equipment, net of accumulated depreciation of 264,499 and 259,126 in 2017 and 2016, respectively                                 156,588,000                                                  
  intangible assets, net of accumulated amortization of 188,965 and 178,813 in 2017 and 2016, respectively                                 385,304,000                                                  
  long-term debt, net of debt discount and debt issuance costs of 16,283 and 17,278 in 2017 and 2016, respectively                                 1,309,800,000                                                  
  trade accounts receivable, net of allowance for doubtful accounts of 22,007 and 22,587                                                                                   
  in 2016 and 2015, respectively                                  1,034,402,000                                                 
  current deferred income taxes                                      8,455,000    35,916,000 35,031,000 43,801,000  44,691,000 27,603,000 30,615,000 28,772,000 42,151,000 29,431,000 27,963,000 29,509,000 28,217,000 9,384,000 3,158,000 3,142,000 3,046,000 1,653,000 1,622,000 1,670,000 1,686,000 2,871,000 2,878,000 2,856,000 2,857,000 267,000 76,000 3,146,000 4,026,000 16,970,000 14,237,000 17,721,000 14,991,000 16,984,000 15,384,000 13,712,000 13,399,000 6,620,000 5,299,000 4,528,000 3,920,000 
  long-term debt, net of debt discount and debt issuance costs of 17,278 and 182,041                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2016 and 2015, respectively                                  43,000 43,000 43,000 43,000                                              
  trade accounts receivable, net of allowance for doubtful accounts of 22,943 and 22,587 in 2016 and 2015, respectively                                   1,102,140,000                                                
  property, buildings and equipment, net of accumulated depreciation of 255,680 and 243,005 in 2016 and 2015, respectively                                   160,915,000                                                
  intangible assets, net of accumulated amortization of 170,613 and 138,374 in 2016 and 2015, respectively                                   407,401,000                                                
  long-term debt, net of discount and debt issuance costs of 18,238 and 182,041 in 2016 and 2015, respectively                                   1,418,708,000                                                
  trade accounts receivable, net of allowance for doubtful accounts of 23,337 and 22,587 in 2016 and 2015, respectively                                    1,117,983,000                                               
  property, buildings and equipment, net of accumulated depreciation of 252,234 and 243,005 in 2016 and 2015, respectively                                    163,857,000                                               
  intangible assets, net of accumulated amortization of 161,933 and 138,374 in 2016 and 2015, respectively                                    420,147,000                                               
  long-term debt, net of discount and debt issuance costs of 183,997 and 182,041 in 2016 and 2015, respectively                                    1,360,658,000                                               
  trade accounts receivable, net of allowance for doubtful accounts of 22,774 and 22,587 in 2016 and 2015, respectively                                     1,091,504,000                                              
  property, buildings and equipment, net of accumulated depreciation of 249,090 and 243,005 in 2016 and 2015, respectively                                     167,539,000                                              
  intangible assets, net of accumulated amortization of 151,991 and 138,374 in 2016 and 2015, respectively                                     421,716,000                                              
  long-term debt, net of discount and debt issuance costs of 180,143 and 182,041 in 2016 and 2015, respectively                                     1,391,227,000                                              
  trade accounts receivable, net of allowance for doubtful accounts of 22,587 and 21,084 in 2015 and 2014, respectively                                      1,075,257,000                                             
  long-term debt, net of discount of 164,342 and 170,367 in 2015 and 2014, respectively                                      1,456,761,000                                             
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2015 and 2014, respectively                                      43,000 43,000 43,000                                           
  accumulated other comprehensive income                                      -423,155,000    -201,892,000 -143,814,000 -80,020,000 -123,043,000 -76,543,000 -44,255,000 -68,874,000 -24,525,000 -1,044,000 24,354,000 13,702,000 19,247,000 10,057,000 5,948,000 32,359,000 30,619,000 22,633,000 16,712,000 10,811,000 18,389,000 10,985,000 3,062,000 -8,333,000 -24,344,000 -18,338,000 13,882,000 21,399,000 19,075,000 25,832,000 23,884,000 22,292,000 14,533,000 14,530,000 16,629,000 16,543,000 13,774,000 13,635,000 12,442,000 9,042,000 9,291,000 9,847,000 
  total wesco international stockholders' equity                                      1,776,672,000   1,838,043,000 1,928,652,000 1,908,727,000 1,889,586,000 1,773,627,000 1,764,809,000 1,738,305,000 1,642,583,000 1,617,371,000 1,553,797,000 1,544,622,000 1,468,534,000 1,411,305,000 1,345,998,000                             
  noncontrolling interest                                      -2,801,000  -1,828,000 -725,000 -487,000 -82,000 -84,000 -68,000 -18,000 20,000 64,000 -1,000 -106,000 -92,000 -68,000 -126,000 -88,000                             
  trade accounts receivable, net of allowance for doubtful accounts of 22,513 and 21,084 in 2015 and 2014, respectively                                       1,149,743,000                                            
  property, buildings and equipment, net of accumulated depreciation of 239,604 and 229,196 in 2015 and 2014, respectively                                       171,789,000                                            
  intangible assets, net of accumulated amortization of 130,929 and 110,828 in 2015 and 2014, respectively                                       388,988,000                                            
  long-term debt, net of discount of 165,714 and 170,367 in 2015 and 2014, respectively                                       1,454,705,000                                            
  trade accounts receivable, net of allowance for doubtful accounts of 22,081 and 21,084 in 2015 and 2014, respectively                                        1,124,893,000                                           
  property, buildings and equipment, net of accumulated depreciation of 237,656 and 229,196 in 2015 and 2014, respectively                                        180,049,000                                           
  intangible assets, net of accumulated amortization of 125,899 and 110,828 in 2015 and 2014, respectively                                        415,327,000                                           
  long-term debt, net of discount of 167,029 and 170,367 in 2015 and 2014, respectively                                        1,436,802,000                                           
  trade accounts receivable, net of allowance for doubtful accounts of 20,646 and 21,084 in 2015 and 2014, respectively                                         1,082,199,000                                          
  property, buildings and equipment, net of accumulated depreciation of 232,412 and 229,196 in 2015 and 2014, respectively                                         173,878,000                                          
  intangible assets, net of accumulated amortization of 139,192 and 110,828 in 2015 and 2014, respectively                                         398,673,000                                          
  long-term debt, net of discount of 168,549 and 170,367 in 2015 and 2014, respectively                                         1,336,881,000                                          
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2014 and 2013, respectively                                         43,000 43,000 43,000 43,000 43,000                                      
  trade accounts receivable, net of allowance for doubtful accounts of 21,084 and 19,309 in 2014 and 2013, respectively                                          1,117,420,000                                         
  long-term debt, net of discount of 170,367 and 174,686 in 2014 and 2013, respectively                                          1,366,430,000                                         
  trade accounts receivable, net of allowance for doubtful accounts of 23,069 and 19,309 in 2014 and 2013, respectively                                           1,218,759,000                                        
  property, buildings and equipment, net of accumulated depreciation of 229,041 and 213,758 in 2014 and 2013, respectively                                           191,393,000                                        
  long-term debt, net of discount of 171,547 and 174,686 in 2014 and 2013, respectively                                           1,471,774,000                                        
  trade accounts receivable, net of allowance for doubtful accounts of 22,153 and 19,309 in 2014 and 2013, respectively                                            1,186,062,000                                       
  property, buildings and equipment, net of accumulated depreciation of 225,715 and 213,758 in 2014 and 2013, respectively                                            199,951,000                                       
  long-term debt, net of discount of 172,683 and 174,686 in 2014 and 2013, respectively                                            1,520,960,000                                       
  trade accounts receivable, net of allowance for doubtful accounts of 19,682 and 19,309 in 2014 and 2013, respectively                                             1,105,297,000                                      
  property, buildings and equipment, net of accumulated depreciation of 218,743 and 213,758 in 2014 and 2013, respectively                                             195,263,000                                      
  long-term debt, net of discount of 173,611 and 174,686 in 2014 and 2013, respectively                                             1,457,586,000                                      
  trade accounts receivable, net of allowance for doubtful accounts of 19,309 and 17,242 in 2013 and 2012, respectively                                              1,045,054,000                                     
  long-term debt, net of discount of 174,686 and 183,644 in 2013 and 2012, respectively                                              1,447,634,000                                     
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2013 and 2012, respectively                                              43,000 43,000 43,000 43,000                                  
  trade accounts receivable, net of allowance for doubtful accounts of 19,968 and 17,242 in 2013 and 2012, respectively                                               1,116,007,000                                    
  property, buildings and equipment, net of accumulated depreciation of 211,193 and 199,115 in 2013 and 2012, respectively                                               201,905,000                                    
  long-term debt, net of discount of 180,309 and 183,644 in 2013 and 2012, respectively                                               1,535,464,000                                    
  trade accounts receivable, net of allowance for doubtful accounts of 17,888 and 17,242 in 2013 and 2012, respectively                                                1,101,753,000                                   
  property, buildings and equipment, net of accumulated depreciation of 208,388 and 199,115 in 2013 and 2012, respectively                                                198,930,000                                   
  long-term debt, net of discount of 181,311 and 183,644 in 2013 and 2012, respectively                                                1,572,415,000                                   
  trade accounts receivable, net of allowance for doubtful accounts of 17,379 and 17,242 in 2013 and 2012, respectively                                                 1,094,278,000                                  
  property, buildings and equipment, net of accumulated depreciation of 205,110 and 199,115 in 2013 and 2012, respectively                                                 207,166,000                                  
  long-term debt, net of discount of 182,504 and 183,644 in 2013 and 2012, respectively                                                 1,634,813,000                                  
  trade accounts receivable, net of allowance for doubtful accounts of 17,242 and 21,590 in 2012 and 2011, respectively                                                  1,036,235,000                                 
  long-term debt, net of discount of 183,644 and 175,908 in 2012 and 2011, respectively                                                  1,695,413,000                                 
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2012 and 2011, respectively                                                  43,000 43,000 43,000 43,000                              
  trade accounts receivable, net of allowance for doubtful accounts of 20,496 and 21,590 in 2012 and 2011, respectively                                                   1,020,454,000                                
  property, buildings and equipment, net of accumulated depreciation of 195,051 and 190,385 in 2012 and 2011, respectively                                                   140,998,000                                
  long-term debt, net of discount of 173,685 and 175,908 in 2012 and 2011, respectively                                                   696,758,000                                
  trade accounts receivable, net of allowance for doubtful accounts of 20,811 and 21,590 in 2012 and 2011, respectively                                                    1,013,990,000                               
  property, buildings and equipment, net of accumulated depreciation of 189,971 and 190,385 in 2012 and 2011, respectively                                                    137,199,000                               
  long-term debt, net of discount of 174,485 and 175,908 in 2012 and 2011, respectively                                                    562,750,000                               
  trade accounts receivable, net of allowance for doubtful accounts of 21,347 and 21,590 in 2012 and 2011, respectively                                                     1,006,398,000                              
  long-term debt, net of discount of 175,200 and 175,908 in 2012 and 2011, respectively                                                     603,328,000                              
  trade accounts receivable, net of allowance for doubtful accounts of 21,590 and 18,562 in 2011 and 2010, respectively                                                      939,422,000                             
  long-term debt, net of discount of 175,908 and 178,427 in 2011 and 2010, respectively                                                      642,922,000                             
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2011 and 2010, respectively                                                      43,000 43,000 43,000 43,000                          
  trade accounts receivable, net of allowance for doubtful accounts of 21,806 and 18,562 in 2011 and 2010, respectively                                                       950,435,000                            
  long-term debt, net of discount of 176,559 and 178,427 in 2011 and 2010, respectively                                                       725,669,000                            
  trade accounts receivable, net of allowance for doubtful accounts of 21,090 and 18,562 in 2011 and 2010, respectively                                                        920,785,000                           
  long-term debt, net of discount of 177,216 and 178,427 in 2011 and 2010, respectively                                                        753,590,000                           
  trade accounts receivable, net of allowance for doubtful accounts of 20,142 and 18,562 in 2011 and 2010, respectively                                                         885,361,000                          
  long-term debt, net of discount of 177,822 and 178,427 in 2011 and 2010, respectively                                                         703,339,000                          
  trade accounts receivable, net of allowance for doubtful accounts of 18,562 and 20,060 in 2010 and 2009, respectively                                                          792,681,000                         
  investment in subsidiary                                                             40,046,000 43,957,000 44,540,000 45,112,000 45,684,000 46,251,000 46,811,000 47,787,000 47,267,000              
  long-term debt, net of discount of 178,427 and 182,689 in 2010 and 2009, respectively                                                          725,893,000                         
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2010 and 2009, respectively                                                          43,000 43,000 43,000 43,000                      
  trade accounts receivable, net of allowance for doubtful accounts of 18,589 and 20,060 in 2010 and 2009, respectively                                                           796,370,000                        
  long-term debt, net of discount of 178,959 and 182,689 in 2010 and 2009, respectively                                                           483,646,000                        
  trade accounts receivable, net of allowance for doubtful accounts of 20,241 and 20,060 in 2010 and 2009, respectively                                                            731,320,000                       
  long-term debt, net of discount of 180,131 and 182,689 in 2010 and 2009, respectively                                                            483,812,000                       
  trade accounts receivable, net of allowance for doubtful accounts of 21,530 and 20,060 in 2010 and 2009, respectively                                                             689,119,000                      
  long-term debt, net of discount of 181,410 and 182,689 in 2010 and 2009, respectively                                                             540,952,000                      
  trade accounts receivable, net of allowance for doubtful accounts of 20,060 and 19,665 in 2009 and 2008, respectively                                                              635,754,000                     
  long-term debt                                                              597,869,000    841,928,000 649,734,000 742,693,000 748,022,000 811,311,000 801,576,000 838,485,000 777,238,000 743,887,000 348,816,000 349,122,000 348,477,000 352,232,000 351,654,000 247,748,000 268,079,000 386,173,000 
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 shares issued in 2009 and 2008; no shares outstanding in 2009 and 2008                                                              43,000                     
  trade accounts receivable, net of allowance for doubtful accounts of 22,414 and 19,665 in 2009 and 2008, respectively                                                               663,433,000                    
  long-term debt, net of discount of 183,942 and 40,501 in 2009 and 2008, respectively                                                               701,047,000                    
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2009 and 2008, respectively                                                               43,000 43,000 43,000                  
  trade accounts receivable, net of allowance for doubtful accounts of 21,349 and 19,665 in 2009 and 2008, respectively                                                                680,499,000                   
  long-term debt, net of discount of 32,810 and 40,501 in 2009 and 2008, respectively                                                                929,905,000                   
  trade accounts receivable, net of allowance for doubtful accounts of 18,373 and 19,665 in 2009 and 2008, respectively                                                                 687,801,000                  
  long-term debt, net of discount of 36,655 and 40,501 in 2009 and 2008, respectively                                                                 757,201,000                  
  trade accounts receivable, net of allowance for doubtful accounts of 19,665 and 17,418 in 2008 and 2007, respectively                                                                  791,356,000                 
  stockholders’ equity                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 shares issued in 2008 and 2007; no shares outstanding in 2008 and 2007                                                                  43,000                 
  trade accounts receivable, net of allowance for doubtful accounts of 20,560 and 17,418 in 2008 and 2007, respectively                                                                   937,773,000                
  deferred acquisition payable                                                                   186,000 186,000 1,284,000 1,285,000 1,458,000 1,333,000 1,333,000 3,453,000 3,936,000 4,632,000 8,180,000 2,680,000 1,013,000 1,013,000 1,013,000 1,014,000 
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2008 and 2007, respectively                                                                   43,000 43,000 43,000              
  trade accounts receivable, net of allowance for doubtful accounts of 17,597 and 17,418 in 2008 and 2007, respectively                                                                    918,845,000               
  trade accounts receivable, net of allowance for doubtful accounts of 17,541 and 17,418 in 2008 and 2007, respectively                                                                     864,127,000              
  trade accounts receivable, net of allowance for doubtful accounts of 17,418 and 12,641 in 2007 and 2006, respectively                                                                      844,514,000             
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 shares issued in 2007 and 2006; no shares outstanding in 2007 and 2006                                                                      43,000             
  trade accounts receivable, net of allowance for doubtful accounts of 19,325 and 12,641 in 2007 and 2006, respectively                                                                       913,705,000            
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2007 and 2006, respectively                                                                       43,000            
  trade accounts receivable, net of allowance for doubtful accounts of 19,092 and 12,641 in 2007 and 2006, respectively                                                                        892,237,000           
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued in 2007 and 2006; no shares outstanding in 2007 and 2006                                                                        43,000 43,000          
  trade accounts receivable, net of allowance for doubtful accounts of 17,861 and 12,641 in 2007 and 2006, respectively                                                                         865,699,000          
  trade accounts receivable, net of allowance for doubtful accounts of 12,641 and 12,609 in 2006 and 2005, respectively                                                                          829,962,000         
  long-term deferred acquisition payable                                                                             3,333,000 4,346,000 1,013,000 1,013,000 1,013,000 2,026,000 
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 shares issued in 2006 and 2005; no shares outstanding in 2006 and 2005                                                                          43,000         
  trade accounts receivable, net of allowance for doubtful accounts of 13,089 and 12,609 in 2006 and 2005, respectively                                                                           460,966,000        
  short-term debt related to revolving credit facility                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued in 2006 and 2005; no shares outstanding                                                                           43,000 43,000 43,000      
  retained deficit                                                                           -9,319,000 -68,704,000  -168,332,000     
  trade accounts receivable, net of allowance for doubtful accounts of 13,951 and 12,609 in 2006 and 2005, respectively                                                                            386,189,000       
  trade accounts receivable, net of allowance for doubtful accounts of 15,293 and 12,609 in 2006 and 2005, respectively                                                                             348,611,000      
  trade accounts receivable, net of allowance for doubtful accounts of 12,609 and 12,481 in 2005 and 2004, respectively                                                                              315,594,000     
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 shares issued in 2005 and 2004; no shares outstanding in 2005 and 2004                                                                              43,000     
  trade accounts receivable, net of allowance for doubtful accounts of 12,806 and 12,481 in 2005 and 2004, respectively                                                                               439,633,000    
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued in 2005 and 2004, no shares outstanding in 2004                                                                               43,000    
  trade accounts receivable, net of allowance for doubtful accounts of 11,992 and 12,481 in 2005 and 2004, respectively                                                                                335,428,000   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 issued in 2005 and 2004; no shares outstanding                                                                                43,000 43,000  
  trade accounts receivable, net of allowance for doubtful accounts of 11,987 and 12,481 in 2005 and 2004, respectively                                                                                 339,613,000  
  trade accounts receivable, net of allowance for doubtful accounts of 12,481 and 11,422 in 2004 and 2003, respectively                                                                                  383,364,000 
  stockholders’ equity (note 9) :                                                                                   
  class b nonvoting convertible common stock, .01 par value; 20,000,000 shares authorized, 4,339,431 shares issued in 2004 and 2003; no shares outstanding in 2004                                                                                  43,000 

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