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Long-term Debt - Schedule of Notes Payable (Details) - Other Notes Payable - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Notes payable $ 39.8 $ 44.7
Sale/leaseback transactions involving real estate accounted for as financings    
Debt Instrument [Line Items]    
Notes payable 28.0 28.0
Construction of a new hospital | LIBOR    
Debt Instrument [Line Items]    
Notes payable $ 11.8 $ 12.9
Effective interest rate (percent) 5.00% 5.00%
Other    
Debt Instrument [Line Items]    
Notes payable $ 0.0 $ 3.8
Minimum | Sale/leaseback transactions involving real estate accounted for as financings    
Debt Instrument [Line Items]    
Effective interest rate (percent) 8.10% 8.10%
Minimum | Other    
Debt Instrument [Line Items]    
Effective interest rate (percent) 4.30% 4.30%
Maximum | Sale/leaseback transactions involving real estate accounted for as financings    
Debt Instrument [Line Items]    
Effective interest rate (percent) 11.20% 11.20%
Maximum | Other    
Debt Instrument [Line Items]    
Effective interest rate (percent) 6.80% 6.80%