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Debt Obligation Maturities (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Maturities [Abstract]    
Debt maturities - 2022 $ 903  
Debt maturities - 2023 1,585  
Debt maturities - 2024 1,235  
Debt maturities - 2025 1,232  
Debt maturities - 2026 39  
Debt maturities - Thereafter 18,086  
Total 23,080  
Fair Value $ 27,728 $ 29,300