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Acquisitions, Goodwill, and Other Intangible Assets, Net - HMG Additional Payments and Acquisition and Integration Costs - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
HMG | Contingent Consideration, Value Of Common Stock      
Business Acquisition [Line Items]      
Business combination, contingent consideration, current $ 35.0   $ 34.0
Unrealized gain (loss) included in other income $ (1.6)    
Business acquisition, number of shares issued (in shares) 160,000    
HMG | Contingent Consideration, Collections From Acquired Receivables      
Business Acquisition [Line Items]      
Unrealized gain (loss) included in other income $ 8.2    
Business acquisition, number of shares issued (in shares) 87,900    
Earn-out liability $ 19.4    
2023 Acquisitions      
Business Acquisition [Line Items]      
Business acquisition, number of shares issued (in shares)   120,000  
Earn-out liability     1.0
Business combination, acquisition and integration related costs   $ 17.1  
2023 Acquisitions | General and Administrative Expense      
Business Acquisition [Line Items]      
Business combination, acquisition and integration related costs   14.6  
2023 Acquisitions | Cost of Revenue, Excluding Depreciation and Amortization      
Business Acquisition [Line Items]      
Business combination, acquisition and integration related costs   $ 2.5  
2023 and 2024 Acquisitions      
Business Acquisition [Line Items]      
Business combination, integration related liabilities     $ 0.3