v3.7.0.1
Intangible Assets and Goodwill (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization of Intangible Assets $ 80 $ 80
Finite-lived intangible assets, 2017 240  
Finite-lived intangible assets, 2018 320  
Finite-lived intangible assets, 2019 320  
Finite-lived intangible assets, 2020 320  
Finite-lived intangible assets, 2021 320  
Finite-lived intangible assets, 2022 $ 320