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Commitment, Contingencies, And Guarantees (Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Interest expense reclassified from OCI $ 174 $ 150 $ 499 $ 416
Fair Value Hedging        
Financial Instruments Owned and Pledged as Collateral [Line Items]        
Gain/(loss) recognized in OCI (17) (94) 23 (94)
Net realized gain/(loss) reclassified from OCI (51) (32) (20) (32)
Interest expense reclassified from OCI (4) 0 (12) 0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent $ 38 $ (62) $ 55 $ (62)