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Contingencies and Other Commitments (Details)
$ in Millions
1 Months Ended 12 Months Ended
Jun. 21, 2019
USD ($)
May 18, 2016
USD ($)
Jul. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2019
Feb. 28, 2015
patient
Apr. 24, 2014
facilities
Aug. 12, 2013
facilities
Mar. 04, 2013
facilities
patient
Pending Litigation [Member] | Honts lawsuit [Member]                  
Loss Contingencies [Line Items]                  
Number of hospitals involved in lawsuit | facilities               1  
Punitive damages awarded in favor of plaintiff   $ 20.0              
Portion of liability that would be covered through captive insurance subsidiary       $ 6.0          
Pending Litigation [Member] | HHS-OIG Investigation [Member]                  
Loss Contingencies [Line Items]                  
Number of hospitals that received subpoenas | facilities             7   4
Number of patient medical records requested for each hospital in subpoenas | patient                 100
Number of hospitals that received supplemental subpoenas | facilities             2    
Number of additional patient medical records requested | patient           70      
Compliance threshold under Health Care Act (percent)         60.00%        
Loss Contingency Accrual       $ 48.0          
Settled Litigation [Member] | HHS-OIG Investigation [Member]                  
Loss Contingencies [Line Items]                  
Litigation Settlement, Amount Awarded to Other Party $ 48.0                
Loss Contingency Accrual, Payments $ 46.4                
Maximum [Member] | Settled Litigation [Member] | Nichols Litigation [Member]                  
Loss Contingencies [Line Items]                  
Loss Contingency Accrual, Payments     $ 0.1