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Summary of Significant Accounting Policies - Accounting Changes (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Jan. 01, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Recently issued ASUs          
Equity $ 19,641   $ 17,937 $ 16,525 $ 15,201
Retained Earnings          
Recently issued ASUs          
Equity $ 17,377   16,459 $ 15,617 $ 14,931
Cumulative Effect, Period of Adoption, Adjustment          
Recently issued ASUs          
Equity     5    
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings          
Recently issued ASUs          
Equity   $ 5 $ 5