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Acquisitions and Disposals - Summary (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Net assets acquired:    
Goodwill $ 3,925.8 $ 3,911.8
Surgical Facilities    
Business Acquisition [Line Items]    
Total consideration 34.7  
Fair value of non-controlling interests 10.6  
Aggregate acquisition date fair value 45.3  
Net assets acquired:    
Current assets 5.3  
Property and equipment 1.9  
Goodwill 42.7  
Right-of-use operating lease assets 20.7  
Current liabilities (5.5)  
Right-of-use operating lease liabilities (19.8)  
Aggregate acquisition date fair value $ 45.3