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Goodwill and Other Intangible Assets, Net - Other Intangible Assets, Net (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Gross Intangible Assets    
Beginning balance $ 1,158.4  
Acquisitions 136.0  
Adjustments and Other (662.4)  
Ending balance 632.0  
Accumulated Amortization    
Beginning balance (811.2)  
Additions Charged to Expense (47.4)  
Adjustments and Other 673.8  
Ending balance (184.8)  
Other Intangible Assets, Net 447.2 $ 347.2
Customer relationships    
Gross Intangible Assets    
Beginning balance 1,013.5  
Acquisitions 133.1  
Adjustments and Other (572.6)  
Ending balance 574.0  
Accumulated Amortization    
Beginning balance (709.1)  
Additions Charged to Expense (37.5)  
Adjustments and Other 590.5  
Ending balance (156.1)  
Other Intangible Assets, Net 417.9  
Non-compete agreements    
Gross Intangible Assets    
Beginning balance 67.9  
Acquisitions 1.6  
Adjustments and Other (39.7)  
Ending balance 29.8  
Accumulated Amortization    
Beginning balance (50.9)  
Additions Charged to Expense (4.8)  
Adjustments and Other 39.7  
Ending balance (16.0)  
Other Intangible Assets, Net 13.8  
Other intangible assets    
Gross Intangible Assets    
Beginning balance 77.0  
Acquisitions 1.3  
Adjustments and Other (50.1)  
Ending balance 28.2  
Accumulated Amortization    
Beginning balance (51.2)  
Additions Charged to Expense (5.1)  
Adjustments and Other 43.6  
Ending balance (12.7)  
Other Intangible Assets, Net $ 15.5