Business Combinations, Asset Acquisitions, and Joint Venture Formation	9 Months Ended
	Sep. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Business Combination Disclosure	Independent Electric Supply Inc. Effective July 1, 2024, the Company acquired the assets and liabilities of Independent Electric Supply Inc. (“IES”), a full-line electrical distributor headquartered in Ontario, Canada. The total preliminary estimated fair value of consideration for the acquisition of IES of $13.2 million includes total cash consideration of $11.6 million, net of cash acquired, paid at closing with cash on hand, and contingent consideration not to exceed $2.9 million. The assets acquired included a customer relationship intangible asset with an estimated fair value of $5.9 million. entroCIM On June 3, 2024, the Company acquired the assets and liabilities held by Warez, LLC and Hepta Systems, LLC, which own and operate the entroCIM business (collectively, “entroCIM”). entroCIM is an innovator in data center and building intelligence software. The total preliminary estimated fair value of consideration for the acquisition of entroCIM of $36.5 million includes total cash consideration of $30.1 million, paid at closing with cash on hand, and contingent consideration not to exceed $8.0 million, with an estimated fair value of $6.4 million, recorded in current and noncurrent liabilities in the Condensed Consolidated Balance Sheet as of September 30, 2024. The preliminary purchase consideration was allocated to the identified assets acquired and liabilities assumed based on their respective acquisition date fair value, which primarily comprised a developed software intangible asset with an estimated fair value of $8.0 million based on an income valuation method, with the excess of $29.0 million allocated to goodwill in the Company's CSS reportable segment.
Acquisitions	Wesco Integrated Supply (“WIS”) Divestiture On April 1, 2024, Wesco Distribution, Inc. (“Wesco Distribution”) completed the sale of its WIS business for total consideration of $334.2 million, adjusted from the base purchase price of $350.0 million for estimated net working capital, estimated closing cash, and estimated closing indebtedness. The WIS business, located primarily in the U.S. and Canada, was part of the UBS reportable segment and provided products and services to large industrial and commercial end-users to support their maintenance, repair, and operating spend. During the third quarter, the Company finalized the net working capital, closing cash, and closing indebtedness purchase price adjustments, which resulted in a working capital adjustment of $20.7 million and an increase to the gain from the sale. The Company recognized a gain from the sale of $19.3 million and $122.2 million for the three and nine months ended September 30, 2024, respectively, which is recorded as a component of other (income) expense, net in the Condensed Consolidated Statements of Income and Comprehensive Income. Upon closing, Wesco Distribution entered into certain Transition Services Agreements (“TSAs”) under which Wesco Distribution agreed to provide transition services to the purchaser for approximately nine months. Revenues associated with these TSAs are not material. The sale of the WIS business did not represent a strategic shift that had a major effect on the Company’s operations and financial results, and therefore does not meet the criteria to be classified as discontinued operations.