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REVENUE Variable Consideration (Details) | 3 Months Ended
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Mar. 31, 2020
Revenue, Methods, Inputs, and Assumptions Used [Abstract] |
Revenue, Information Used to Assess Variable Consideration Constraint | WESCO’s revenues are adjusted for variable consideration, which includes customer volume rebates, returns, and discounts. WESCO measures variable consideration by estimating expected outcomes using analysis and inputs based upon anticipated performance, historical data, as well as current and forecasted information. Measurement and recognition of variable consideration is reviewed by management on a monthly basis and revenue is adjusted accordingly. Variable consideration reduced revenue for the three months ended March 31, 2020 and 2019 by approximately $23.3 million and $25.5 million, respectively.

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- Definition Description of methods, inputs, and assumptions used to assess estimate of variable consideration with probability of subsequent revenue reversal. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130566-203045 + Details
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- References No definition available. + Details
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