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Business Combinations and Asset Acquisitions (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2023
Asset Acquisition [Line Items] |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Reasons |  | The estimated fair values of assets acquired and liabilities assumed were based on preliminary calculations and valuations using estimates and assumptions at the time of acquisition. As the Company obtained additional information during the measurement period (not exceeding one year from the acquisition date), it recorded adjustments to its preliminary estimates of fair value, as described above. As of September 30, 2023, the Company expects that additional adjustments to the fair value of certain tax balances will be necessary.
Goodwill, Purchase Accounting Adjustments |  | $ 0.7
Rahi Systems |  |
Asset Acquisition [Line Items] |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual | $ 131.1 | $ 417.6
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 |  | $ 19.6
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable |  | 28.0
Goodwill, Purchase Accounting Adjustments |  | 0.7
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets |  | 2.9
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities |  | 1.7
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredIncomeTaxes |  | $ (6.5)

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- Definition With respect to a business combination completed during the period, this element provides a description of the business, other than the name, which may include the industry, size, products and other important information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to financial assets acquired in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-4A + Details
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- Definition This element represents a description of the reasons why the initial accounting is incomplete for those particular assets, liabilities, noncontrolling interests, or items of consideration for which the amounts recognized in the financial statements have been determined only provisionally. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-4A + Details
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- Definition This element represents a description of the primary reason for the business combination which may consist of general categories such as top-line growth, synergistic benefits, market share, and diversification and the more detailed factors that might apply. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482573/350-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 25 -Paragraph 16 -SubTopic 10 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479405/805-10-25-16 + Details
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