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REVENUE (Tables)
 12 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue [Table Text Block]
The following tables disaggregate WESCO’s net sales by end market and geography:
 
Year Ended December 31,
(In thousands)
2019
 
2018
 
2017
Industrial
$
3,000,253

 
$
2,983,062

 
$
2,852,357

Construction
2,743,852

 
2,684,844

 
2,546,261

Utility
1,347,448

 
1,303,697

 
1,181,704

Commercial, Institutional and Government
1,267,364

 
1,204,998

 
1,098,699

Total by end market
$
8,358,917

 
$
8,176,601

 
$
7,679,021

 
Year Ended December 31,
(In thousands)
2019
 
2018
 
2017
United States
$
6,234,119

 
$
6,089,130

 
$
5,775,988

Canada (1)
1,647,066

 
1,647,933

 
1,521,378

Other International (1)
477,732

 
439,538

 
381,655

Total by geography
$
8,358,917

 
$
8,176,601

 
$
7,679,021

(1) 
The prior periods has been reclassified to confirm to the current period's presentation.