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REVENUE (Tables) | 12 Months Ended
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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.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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