Acquisitions, Goodwill, and Other Intangible Assets, Net - Pro Forma Financial Information, Acquisition Results, and Acquisition and Integration Costs - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Acquisition [Line Items]
Business combinations, unaudited supplemental pro forma revenue	$ 2,500.0	$ 3,000.0	$ 6,800.0	$ 7,900.0
Business combinations, unaudited supplemental pro forma net income (loss)	54.0	145.4	37.3	271.0
Business combinations, consolidated acquisition-related revenue	569.7	344.4	1,876.6	702.7
Business combinations, consolidated acquisition-related income (loss)	18.4	(6.6)	37.7	(1.3)
2021 Acquisitions, Henkels & McCoy Group, Inc. and INTREN
Business Acquisition [Line Items]
Business combinations, consolidated acquisition-related revenue	429.3		1,457.7
INTREN
Business Acquisition [Line Items]
Business combinations, consolidated acquisition-related revenue		$ 172.8		$ 275.4
2021 and 2022 Acquisitions
Business Acquisition [Line Items]
Business combination, acquisition and integration related costs	33.3		59.4
Business combination, integration related liabilities	5.6		5.6
2021 and 2022 Acquisitions | General and Administrative Expense
Business Acquisition [Line Items]
Business combination, acquisition and integration related costs	9.2		35.3
2021 and 2022 Acquisitions | Cost of Revenue, Excluding Depreciation and Amortization
Business Acquisition [Line Items]
Business combination, acquisition and integration related costs	$ 21.4
2021 and 2022 Acquisitions | Other Expense
Business Acquisition [Line Items]
Business combination, acquisition and integration related costs			$ 2.7