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Debt 2 (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Long Term Debt By Maturity Abstract    
2019 $ 7,150  
2020 6,600  
2021 2,890  
2022 2,050  
2023 0  
Thereafter 2,000  
Total 20,690  
Unamortized Underwriting Fees (30) $ (49)
Unamortized Discount (29)  
Impacts due to Fair Value Hedge Accounting (184)  
Total Long-term Debt $ 20,447 $ 24,153