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Debt 2 (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Long-term Debt, Fiscal Year Maturity [Abstract]    
2020 $ 6,600  
2021 2,864  
2022 2,050  
2023 0  
2024 0  
Thereafter 2,000  
Total 13,514  
Unamortized Underwriting Fees (20) $ (30)
Unamortized Discount (23)  
Impacts due to Fair Value Hedge Accounting (2)  
Total Long-Term Debt $ 13,469 $ 20,447