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Recent Accounting Pronouncements (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2021
Dec. 31, 2020
Dec. 31, 2019
Recent accounting pronouncements          
Total equity $ 3,613 $ 5,941   $ 6,131 $ 5,911
Cumulative Effect, Period of Adoption, Adjustment          
Recent accounting pronouncements          
Total equity         $ (9)
Minimum | Cumulative Effect, Period of Adoption, Adjustment          
Recent accounting pronouncements          
Total equity 400   $ (1,800)    
Maximum | Cumulative Effect, Period of Adoption, Adjustment          
Recent accounting pronouncements          
Total equity $ 600   $ (2,100)