v3.6.0.2
Debt (Annual Debt Marturities) (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Long-term Debt, Fiscal Year Maturity [Abstract]    
2017 $ 762  
2018 225  
2019 498  
2020 1,050  
2021 217  
Thereafter 9,617  
Total debt, gross 12,369  
Debt Issuance Costs, Net 154  
Less: Discount 36  
Debt and Capital Lease Obligations $ 12,179 $ 11,937