EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the details of basic and diluted earnings per share:

	Year Ended December 31,
	2020		2019		2018
(In thousands, except per share data)
Net income attributable to WESCO International, Inc.	$	100,560	$	223,426	$	227,343
Less: Preferred stock dividends	30,139		—		—
Net income attributable to common stockholders	$	70,421	$	223,426	$	227,343
Weighted-average common shares outstanding used in computing basic earnings per share	46,174		43,104		46,722
Common shares issuable upon exercise of dilutive equity awards	451		383		477
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	46,625		43,487		47,199
Earnings per share attributable to common stockholders
Basic	$	1.53	$	5.18	$	4.87
Diluted	$	1.51	$	5.14	$	4.82