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EARNINGS PER SHARE (Tables)
3 Months Ended
Mar. 31, 2024
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
 March 31
(In millions, except per share data)20242023
Net income attributable to WESCO International, Inc.$115.8 $197.1 
Less: Preferred stock dividends14.4 14.4 
Net income attributable to common stockholders$101.4 $182.7 
Weighted-average common shares outstanding used in computing basic earnings per share
50.9 51.0 
Common shares issuable upon exercise of dilutive equity awards
1.0 1.5 
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share51.9 52.5 
Earnings per share attributable to common stockholders
Basic$1.99 $3.58 
Diluted$1.95 $3.48