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ACQUISITIONS (Details)
 12 Months Ended
Dec. 31, 2022
USD ($)
numberOfCities
countries
$ / shares
shares
Dec. 31, 2020
USD ($)
shares
Nov. 01, 2022
USD ($)
Dec. 31, 2021
shares
Jun. 22, 2021
USD ($)
Jun. 22, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
shares
Business Acquisition [Line Items]              
Preferred stock, shares issued | shares 21,612 21,612   21,612     0
Preferred stock, par value | $ / shares $ 0.01            
Number of Cities in which an Entity Operates | numberOfCities 300            
Anixter International [Member]              
Business Acquisition [Line Items]              
Business Acquisition, Effective Date of Acquisition Jun. 22, 2020            
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period $ 8,000,000,000            
Common stock, shares issued | shares           0.2397  
Preferred stock, shares issued | shares           0.6356  
Common Stock           $ 0.01  
Preferred Stock, Dividend Rate, Percentage 10.625%            
Preferred stock, par value | $ / shares           $ 25,000  
Business Acquisition, Description of Acquired Entity Anixter was a leading distributor of network and security solutions, electrical and electronic solutions, and utility power solutions with locations in over 300 cities across approximately 50 countries, and 2019 annual sales of more than $8 billion.            
Business Combination, Reason for Business Combination The Merger brought together two companies with highly compatible capabilities and characteristics. The combination of Wesco and Anixter created an enterprise with scale and has afforded the Company the opportunity to digitalize its business and expand its services portfolio and supply chain offerings.            
Additional countries (in countries) | countries 50            
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual   $ 4,500,000,000          
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual   180,000,000          
Business Acquisition, Transaction Costs   $ 132,200,000          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets         $ 139,847,000 $ 114,258,000  
Anixter International [Member] | Customer-Related Intangible Assets              
Business Acquisition [Line Items]              
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 19 years            
Anixter International [Member] | Cash [Member]              
Business Acquisition [Line Items]              
Business Acquisition, Share Price | $ / shares           $ 72.82  
Rahi Systems              
Business Acquisition [Line Items]              
Business Acquisition, Effective Date of Acquisition Nov. 01, 2022            
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual $ 111,500,000            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets     $ 41,140,000        
Rahi Systems | Customer-Related Intangible Assets              
Business Acquisition [Line Items]              
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 17 years