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SEGMENTS AND RELATED INFORMATION (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

WESCO attributes revenues from external customers to individual countries on the basis of the point of sale. The following table sets forth information about WESCO by geographic area:

	Net Sales Year Ended December 31,																					Long-Lived Assets December 31,
	2018							2017							2016							2018				2017				2016
(In thousands)
United States	$	6,089,130			75	%		$	5,775,988			75	%		$	5,635,803			77	%		$	106,078			$	95,851			$	123,465
Other International(1)	2,087,471				25	%		1,903,033				25	%		1,700,214				23	%		54,800				60,594				65,182
Total	$	8,176,601						$	7,679,021						$	7,336,017						$	160,878			$	156,445			$	188,647

⁽¹⁾  Other primarily includes Canada.

Revenue from External Customers by Products and Services

The following table sets forth information about WESCO’s sales by product category:

	Year Ended December 31,
	2018		2017		2016
(percentages based on total sales)
General Supplies	40%		40%		40%
Wire, Cable and Conduit	14%		15%		14%
Communications and Security	16%		15%		15%
Electrical Distribution and Controls	11%		10%		11%
Lighting and Sustainability	11%		12%		12%
Automation, Controls and Motors	8%		8%		8%

X

- Definition

Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599

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- Definition

Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

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