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Contingencies and Legal Claim Costs - Additional Information (Detail)
$ in Millions
1 Months Ended 3 Months Ended
Dec. 09, 2015
USD ($)
Nov. 03, 2015
USD ($)
Feb. 09, 2015
USD ($)
Jan. 24, 2013
USD ($)
Oct. 28, 2011
Cases
Apr. 25, 2014
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2012
USD ($)
Oct. 31, 2009
USD ($)
Loss Contingencies [Line Items]                      
Number of claims filed | Cases         3            
Payment for legal settlements   $ 215.0                  
Insurance claim receivables   19.0                  
Attorney's fees   $ 5.5                  
Legal claim costs $ 434.0           $ 12.0 $ 120.0 $ 78.0 $ 175.0  
Capital commitment in connection with purchase of hospitals                     $ 450.0
Additional shortfall related to capital expenditures           $ 78.0          
Period of agreed capital commitments             5 years        
Number of year under court-supervisor accounting for expenditures following the purchase             10 years        
Percentage of legal claim costs 9.00%                    
Dispute settlement amount     $ 15.0                
Accrued Liability             $ 448.0 $ 438.0      
Health Care Foundation of Greater Kansas City [Member] | Pending Litigation [Member]                      
Loss Contingencies [Line Items]                      
Judgment award by the court       $ 162.0              
Plaintiff attorneys fees award             $ 12.0        
Percentage of legal claim costs                 9.00% 9.00%