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REVENUE (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The following tables disaggregate WESCO’s revenue by end market and geography:

	Three Months Ended
	March 31
(In thousands)	2019				2018
Industrial	$	736,906			$	758,976
Construction	633,288				637,800
Utility	308,269				315,546
Commercial, Institutional and Government	282,804				281,593
Total by end market	$	1,961,267			$	1,993,915

	Three Months Ended
	March 31
(In thousands)	2019				2018
United States	$	1,460,991			$	1,482,718
Canada (1)	384,596				398,738
Other International (1)	115,680				112,459
Total by geography	$	1,961,267			$	1,993,915

⁽¹⁾  The prior period has been reclassified to conform to the current period presentation.

Revenue Recognition, Revenue Reductions [Policy Text Block]

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, 2019 and 2018 by approximately $25.5 million and $23.8 million, respectively.

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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- References

No definition available.

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X

- Definition

Disclosure of accounting policy of sales arrangements for goods or services that reduce the amount of revenue recognized for example sales returns, allowances, incentives, rebates, discounts and loyalty programs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

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