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EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

	Year Ended December 31,
	2017				2016				2015
(In thousands, except per share data)
Net income attributable to WESCO International	$	163,460			$	101,588			$	210,687
Weighted-average common shares outstanding used in computing basic earnings per share	47,849				44,116				43,433
Common shares issuable upon exercise of dilutive equity awards	512				543				626
Common shares issuable from contingently convertible debentures (see below for basis of calculation)	—				3,674				6,314
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	48,361				48,333				50,373
Earnings per share attributable to WESCO International
Basic	$	3.42			$	2.30			$	4.85
Diluted	$	3.38			$	2.10			$	4.18

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- References

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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