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EARNINGS PER SHARE (Tables) | 3 Months Ended
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Mar. 31, 2025
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table sets forth the computation of basic and diluted earnings per share for the periods presented:
|  |  | Three Months Ended
|  |  | March 31
(In millions, except per share data) |  |  |  |  | 2025 |  | 2024
Net income attributable to WESCO International, Inc. |  |  |  |  | $ | 118.4 |  |  | $ | 115.8 |
Less: Preferred stock dividends |  |  |  |  | 14.4 |  |  | 14.4 |
Net income attributable to common stockholders |  |  |  |  | $ | 104.0 |  |  | $ | 101.4 |
Weighted-average common shares outstanding used in computing basic earnings per share |  |  |  |  | 48.8 |  |  | 50.9 |
Common shares issuable upon exercise of dilutive equity awards |  |  |  |  | 0.8 |  |  | 1.0 |
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share |  |  |  |  | 49.6 |  |  | 51.9 |
Earnings per share attributable to common stockholders |  |  |  |  |  |  |
Basic |  |  |  |  | $ | 2.13 |  |  | $ | 1.99 |
Diluted |  |  |  |  | $ | 2.10 |  |  | $ | 1.95 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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