CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 234,083	$ 212,583
Accounts Receivable, after Allowance for Credit Loss, Current	3,622,067	2,957,613
Accounts and Other Receivables, Net, Current	388,748	375,885
Inventories, net	3,490,121	2,666,219
Prepaid expenses and other current assets	162,068	137,811
Assets, Current	7,897,087	6,350,111
Property, buildings and equipment, net of accumulated depreciation of $229,041 and $213,758 in 2014 and 2013, respectively	372,083	379,012
Operating Lease, Right-of-Use Asset	575,159	530,863
Intangible assets, net	1,853,451	1,944,141
Goodwill	3,123,430	3,208,333
Other assets	259,354	205,239
Assets	14,080,564	12,617,699
Accounts payable	2,578,741	2,140,251
Accrued payroll and benefit costs	239,309	314,962
Current portion of long-term debt	69,295	9,528
Other Liabilities, Current	680,227	585,067
Liabilities, Current	3,567,572	3,049,808
Total long-term debt	5,192,816	4,701,542
Operating Lease, Liability, Noncurrent	455,356	414,248
Deferred Income Tax Liabilities, Net	443,245	437,444
Other Liabilities, Noncurrent	229,629	238,446
Liabilities	9,888,618	8,841,488
Commitments and Contingencies
Additional capital	1,993,709	1,969,332
Retained earnings	$ 3,590,688	$ 3,004,690
Treasury stock, shares (in shares)	22,026,044	22,026,922
Treasury stock, at cost; 22,026,044 and 22,026,922 shares in 2022 and 2021, respectively	$ (957,805)	$ (956,188)
Accumulated other comprehensive income	(430,500)	(236,035)
Total WESCO International, Inc. stockholders' equity	4,196,820	3,782,524
Noncontrolling interest	(4,874)	(6,313)
Total stockholders’ equity	4,191,946	3,776,211
Liabilities and Equity	$ 14,080,564	$ 12,617,699
Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding	$ 0	$ 0
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (in shares)	25,000
Preferred stock, shares outstanding (in shares)	21,612
Preferred stock, shares issued (in shares)	21,612	21,612
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding	$ 0	$ 0
Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	210,000,000	210,000,000
Common stock, shares, issued (in shares)	68,523,468	68,162,297
Common stock, shares outstanding (in shares)	50,836,855	50,474,806
Common stock	$ 685	$ 682
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares, issued (in shares)	4,339,431	4,339,431
Common stock, shares outstanding (in shares)	0	0
Common stock	$ 43	$ 43