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Business Combinations and Asset Acquisitions (Details) - Rahi Systems - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Oct. 31, 2023
Asset Acquisition [Line Items] |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual | $ 108.8 | $ 136.3 |
Business Acquisition, Description of Acquired Entity | Headquartered in Fremont, California, Rahi Systems is a leading provider of global hyperscale data center solutions with over 900 employees in 25 countries. |  |
Business Combination, Reason for Business Combination | Rahi’s expertise with complex information technology projects and global presence strengthen Wesco’s data center solution offerings. |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory |  |  | $ 19.6
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable |  |  | 28.0
Goodwill, Purchase Accounting Adjustments |  |  | 0.9
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets |  |  | 6.4
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities |  |  | 6.1
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes |  |  | $ (7.2)

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