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Acquisitions and Disposals - Acquisitions (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
surgical_facility
physician_practice
Dec. 31, 2020
USD ($)
surgical_facility
Dec. 31, 2019
USD ($)
Business Acquisition [Line Items]      
Total cash consideration, net of cash acquired $ 285.8 $ 104.6 $ 13.8
Surgical Facility and Physician Practice      
Business Acquisition [Line Items]      
Total cash consideration, net of cash acquired $ 285.8 104.6  
Noncash consideration   (8.7)  
Contingent consideration   $ 0.7  
Surgical Facilities      
Business Acquisition [Line Items]      
Number of business entities acquired | surgical_facility 8 3  
Physician Practices      
Business Acquisition [Line Items]      
Number of business entities acquired | physician_practice 2    
Surgical Facilities, Existing Markets      
Business Acquisition [Line Items]      
Number of business entities acquired | surgical_facility 2 5