EARNINGS PER SHARE (Tables)

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table sets forth the computation of basic and diluted earnings per share for the periods presented:

	Three Months Ended				Six Months Ended
	June 30				June 30
(In millions, except per share data)	2023		2022(1)		2023		2022(1)
Net income attributable to WESCO International, Inc.	$	193.1	$	220.7	$	390.2	$	401.9
Less: Preferred stock dividends	14.4		14.4		28.7		28.7
Net income attributable to common stockholders	$	178.7	$	206.3	$	361.5	$	373.2
Weighted-average common shares outstanding used in computing basic earnings per share	51.3		50.7		51.1		50.7
Common shares issuable upon exercise of dilutive equity awards	1.1		1.5		1.3		1.6
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	52.4		52.2		52.4		52.2
Earnings per share attributable to common stockholders
Basic	$	3.48	$	4.07	$	7.07	$	7.37
Diluted	$	3.41	$	3.95	$	6.90	$	7.15