XML 119 R71.htm IDEA: XBRL DOCUMENT v3.10.0.1
Goodwill and Intangible Assets, Net - Intangible Assets Balances (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Intangible Assets, Net (Excluding Goodwill) [Abstract]    
Cost $ 221 $ 221
Accumulated Amortization 174 152
Carrying Amount 47 69
Contract rights and licenses    
Intangible Assets, Net (Excluding Goodwill) [Abstract]    
Cost 201 201
Accumulated Amortization 162 141
Carrying Amount 39 60
Provider network    
Intangible Assets, Net (Excluding Goodwill) [Abstract]    
Cost 20 20
Accumulated Amortization 12 11
Carrying Amount $ 8 $ 9