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Basis of Presentation (Details)
member in Millions, $ in Millions
 3 Months Ended
Aug. 01, 2016
USD ($)
Mar. 31, 2017
USD ($)
member
State
Segment
Basis Of Presentation [Line Items]    
Number of reportable segments (in segment) | Segment   3
Today's Options of New York, Inc. | New York    
Basis Of Presentation [Line Items]    
Final purchase price of business acquisition $ 38  
Health Plans    
Basis Of Presentation [Line Items]    
Number of states in which entity operates (in state) | State   12
Number of members eligible for the health care programs, approximately (in member) | member   4.8
Minimum contract terms   3 years
Maximum contract terms   4 years
Medicare Acquisition terminated    
Basis Of Presentation [Line Items]    
Gain recognized on contract termination   $ 75