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Acquisitions and Disposals - Acquisitions (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
facility
Dec. 31, 2021
USD ($)
facility
physician_practice
Dec. 31, 2020
USD ($)
Business Acquisition [Line Items]      
Total cash consideration, net of cash acquired $ 146.4 $ 285.8 $ 104.6
Goodwill $ 4,137.1 $ 3,911.8 $ 3,468.0
Surgical Facilities      
Business Acquisition [Line Items]      
Number of business entities acquired | facility 7 8  
Total cash consideration, net of cash acquired $ 146.4    
Noncash consideration 5.6    
Liabilities assumed in acquisition 39.4    
Recognized non-controlling interests 89.1    
Goodwill $ 271.7    
Surgical Facilities, Existing Markets      
Business Acquisition [Line Items]      
Number of business entities acquired | facility 2    
Physician Practices      
Business Acquisition [Line Items]      
Number of business entities acquired | physician_practice   2  
Surgical Facilities and Physician Practices      
Business Acquisition [Line Items]      
Total cash consideration, net of cash acquired   $ 285.8  
Recognized non-controlling interests   185.9  
Goodwill   $ 446.1  
In development De Novo Surgical Facilities      
Business Acquisition [Line Items]      
Number of business entities acquired | facility 7    
Surgical Facilities and In-Development De Novo Surgical Facilities      
Business Acquisition [Line Items]      
Total cash consideration, net of cash acquired $ 95.1