Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets (Amortizable Intangibles) (Details)

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Goodwill and Other Intangible Assets (Amortizable Intangibles) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]          
Goodwill, Period Increase (Decrease)     $ 0    
Indefinite-lived Intangible Assets, Period Increase (Decrease)     0    
Finite-Lived Intangible Assets, Gross $ 7,604   7,604   $ 7,523
Accumulated amortization (1,652)   (1,652)   (1,331)
Finite-Lived Intangible Assets, Net, Total 5,952   5,952   6,192
Amortization of Intangible Assets 168 $ 165 322 $ 281  
Remainder of 2018 326   326    
2019 600   600    
2020 576   576    
2021 518   518    
2022 454   454    
FIA Agreement          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 3,630   3,630   3,630
Accumulated amortization (252)   (252)   (157)
Finite-Lived Intangible Assets, Net, Total 3,378   3,378   3,473
Customer Relationships          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 2,684   2,684   2,684
Accumulated amortization (648)   (648)   (501)
Finite-Lived Intangible Assets, Net, Total 2,036   2,036   2,183
Licensing Agreements          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 349   349   330
Accumulated amortization (168)   (168)   (138)
Finite-Lived Intangible Assets, Net, Total 181   181   192
Other Intangible Assets          
Finite-Lived Intangible Assets [Line Items]          
Finite-Lived Intangible Assets, Gross 941   941   879
Accumulated amortization (584)   (584)   (535)
Finite-Lived Intangible Assets, Net, Total $ 357   $ 357   $ 344