Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Asset Acquisition [Line Items]
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. As the Company obtains additional information during the measurement period (not to exceed one year from the acquisition date), estimates and assumptions for the preliminary purchase consideration allocations may change materially.
Goodwill, Purchase Accounting Adjustments		$ 6.2
Rahi Systems
Asset Acquisition [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 150.3	$ 286.6
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		$ 21.8
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable		28.0
Goodwill, Purchase Accounting Adjustments		$ 6.2