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v3.20.2

ACQUISITIONS (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) countries numberOfEmployees numberOfCities | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) countries numberOfEmployees numberOfCities | Jun. 30, 2019 USD ($) | Jun. 22, 2020 USD ($) $ / shares shares
Business Acquisition [Line Items] |  |  |  |  |
Number of Cities in which an Entity Operates | numberOfCities | 300 |  | 300 |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 2,086,706,000 | $ 2,150,088,000 | $ 4,055,353,000 | $ 4,111,355,000 |
Operating Income (Loss) | 15,270,000 | 97,950,000 | 76,183,000 | 168,675,000 |
Revenues | 2,086,706,000 | 2,150,088,000 | $ 4,055,353,000 | 4,111,355,000 |
Business Combination, Provisional Information, Initial Accounting Incomplete, Reasons |  |  | The estimated fair values of assets acquired and liabilities assumed are based on preliminary calculations and valuations using estimates and assumptions at the time of acquisition. The determination of the fair values of assets acquired and liabilities assumed, especially those related to identifiable intangible assets, is preliminary due to the timing of the completion of the Merger and the complexity of combining a multibillion dollar business. Accordingly, as the Company obtains additional information during the measurement period (not to exceed one year from the acquisition date), WESCO's estimates and assumptions for its preliminary purchase consideration allocations may change materially. |  |
Business Combination, Reason for Business Combination |  |  | The Merger brings together two companies with highly compatible capabilities and characteristics. The combination of WESCO and Anixter will create an enterprise with scale and should afford the Company the opportunity to digitize its business, and expand its services portfolio and supply chain offerings. |  |
Business Acquisition, Description of Acquired Entity |  |  | Headquartered near Chicago, Illinois, Anixter is a leading distributor of network and security solutions, electrical and electronic solutions, and utility power solutions with locations in over 300 cities across approximately 50 countries, and annual sales of more than $8 billion. |  |
Business Combination, Goodwill Recognized, Description |  |  | The resulting goodwill is primarily attributable to Anixter's workforce, significant cross-selling opportunities in additional geographies, enhanced scale, and other operational efficiencies. |  |
Anixter International |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 221,857,000 | 0 | $ 221,857,000 | 0 |
Operating Income (Loss) | 18,367,000 | 0 | 18,367,000 | 0 |
Revenues | $ 221,857,000 | 0 | $ 221,857,000 | 0 |
Anixter International |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Acquisition, Effective Date of Acquisition |  |  | Jun. 22, 2020 |  |
Common stock, shares, issued (in shares) | shares |  |  |  |  | 0.2397
Common stock |  |  |  |  | $ 0.01
Preferred stock, shares issued (in shares) | shares |  |  |  |  | 0.6356
Preferred stock, par value (in dollars per share) | $ / shares |  |  |  |  | $ 25,000
Preferred Stock, Dividend Rate, Percentage |  |  | 10.625% |  |
Additional countries (in countries) | countries | 50 |  | 50 |  |
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period |  |  | $ 8,000,000,000 |  |
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  |  | 18,400,000 |  |
Business Combination, Acquisition Related Costs | $ 73,300,000 |  | $ 78,000,000.0 |  |
Anixter International | Cash [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Acquisition, Share Price | $ / shares |  |  |  |  | $ 72.82
Sylvania Lighting Services Corp. [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Acquisition, Effective Date of Acquisition |  |  | Mar. 05, 2019 |  |
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period |  |  | $ 100,000,000 |  |
Number of Employees Employed by the Entity | numberOfEmployees | 220 |  | 220 |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  | $ 11,600,000 |  | $ 11,600,000 |
Anixter International acquisition [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  | $ 221,900,000 |  |

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