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Acquisitions and Disposals - Acquisitions (Details)
$ in Millions
6 Months Ended
Jun. 30, 2022
USD ($)
facility
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Business Acquisition [Line Items]      
Payments for acquisitions, net of cash acquired $ 74.9 $ 15.2  
Goodwill $ 3,993.1   $ 3,911.8
Surgical Facilities      
Business Acquisition [Line Items]      
Number of facilities acquired | facility 4    
Payments for acquisitions, net of cash acquired $ 74.9 15.2  
Noncash consideration 2.6    
Recognized non-controlling interests 41.5 7.5  
Goodwill $ 114.4 $ 20.0  
Surgical Facilities, Existing Markets      
Business Acquisition [Line Items]      
Number of facilities acquired | facility 2