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REVENUE (Tables) | 9 Months Ended
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Sep. 30, 2020
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following tables disaggregate WESCO’s net sales by segment and geography for the periods presented:
| Three Months Ended |  | Nine Months Ended
| September 30 |  | September 30
(In thousands) | 2020 |  | 2019 |  | 2020 |  | 2019
Electrical & Electronic Solutions | $ | 1,653,726 |  |  | $ | 1,250,080 |  |  | $ | 3,811,498 |  |  | $ | 3,626,423 |
Communications & Security Solutions | 1,388,791 |  |  | 235,920 |  |  | 1,953,967 |  |  | 681,087 |
Utility & Broadband Solutions | 1,099,284 |  |  | 662,110 |  |  | 2,431,689 |  |  | 1,951,955 |
Total by segment | $ | 4,141,801 |  |  | $ | 2,148,110 |  |  | $ | 8,197,154 |  |  | $ | 6,259,465 |
| Three Months Ended |  | Nine Months Ended
| September 30 |  | September 30
(In thousands) | 2020 |  | 2019 |  | 2020 |  | 2019
United States | $ | 3,033,101 |  |  | $ | 1,601,962 |  |  | $ | 6,100,877 |  |  | $ | 4,679,251 |
Canada | 582,700 |  |  | 431,233 |  |  | 1,311,724 |  |  | 1,230,855 |
Other International | 526,000 |  |  | 114,915 |  |  | 784,553 |  |  | 349,359 |
Total by geography(1) | $ | 4,141,801 |  |  | $ | 2,148,110 |  |  | $ | 8,197,154 |  |  | $ | 6,259,465 |

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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=121604090&loc=SL49130545-203045 + Details
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