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Acquisitions and Disposals - Acquisitions (Details)
$ in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
surgical_facility
business_entity
Business Acquisition [Line Items]    
Payments for acquisitions, net of cash acquired $ 31.1 $ 2.1
Surgical Facilities    
Business Acquisition [Line Items]    
Number of facilities acquired | surgical_facility   2
Payments for acquisitions, net of cash acquired 31.1  
Noncash consideration $ 2.6  
Surgical Facilities, Existing Markets    
Business Acquisition [Line Items]    
Number of facilities acquired | surgical_facility   1
Series of Individually Immaterial Business Acquisitions    
Business Acquisition [Line Items]    
Number of facilities acquired | business_entity   2