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SEGMENTS AND RELATED INFORMATION (Tables) | 12 Months Ended
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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%

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- Definition Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9031-108599 + Details
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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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