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SEGMENTS AND RELATED INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2019
Segment Reporting [Abstract]  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas
WESCO attributes revenues from external customers to individual countries on the basis of the point of sale. The following table sets forth information about WESCO by geographic area:
 
Net Sales
Year Ended December 31,
 
Long-Lived Assets(1)
December 31,
 
2019
 
2018
 
2017
 
2019
 
2018
 
2017
(In thousands)
(In thousands)
 
(In thousands)
United States
$
6,234,119

 
75
%
 
$
6,089,130

 
75
%
 
$
5,775,988

 
75
%
 
$
315,288

 
$
106,078

 
$
95,851

Canada(2)
1,647,066

 
20
%
 
1,647,933

 
20
%
 
1,521,378

 
20
%
 
95,642

 
50,877

 
56,591

Other International(2)
477,732

 
5
%
 
439,538

 
5
%
 
381,655

 
5
%
 
6,352

 
3,923

 
4,003

Total
$
8,358,917

 
 
 
$
8,176,601

 
 
 
$
7,679,021

 
 
 
$
417,282

 
$
160,878

 
$
156,445

(1) 
As described in Note 2, effective January 1, 2019, the Company adopted Topic 842 using the effective date method. The adoption of Topic 842 resulted in the recognition of right-of-use assets in the balance sheet. As of December 31, 2019, long-lived assets include $235.8 million of operating lease assets.
(2) 
The prior period has been reclassified to confirm to the current period presentation.
Revenue from External Customers by Products and Services
The following table sets forth information about WESCO’s sales by product category:
 
Year Ended December 31,
 
2019
 
2018
 
2017
(percentages based on total sales)
 
 
 
 
 
General Supplies
41%
 
40%
 
40%
Wire, Cable and Conduit
14%
 
14%
 
15%
Communications and Security
16%
 
16%
 
15%
Electrical Distribution and Controls
10%
 
11%
 
10%
Lighting and Sustainability
11%
 
11%
 
12%
Automation, Controls and Motors
8%
 
8%
 
8%