Commitment, Contingencies, And Guarantees (Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest expense	$ 672	$ 570	$ 492
Fair Value Hedging
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain/(loss) recognized in OCI	101	17
Net realized gain/(loss) reclassified from OCI	50	105
Interest expense	$ (16)	$ (5)