Commitment, Contingencies, And Guarantees (Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest expense reclassified from OCI	$ 178	$ 160
Fair Value Hedging
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain (loss) recognized in OCI	(8)	(17)
Net realized gain (loss) reclassified from OCI	(37)	20
Interest expense reclassified from OCI	(4)	(4)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	$ 33	$ (33)

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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