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, 2025	Mar. 31, 2024
Financial Instruments Owned and Pledged as Collateral [Line Items]
Interest expense reclassified from OCI	$ 181	$ 178
Fair Value Hedging
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain (loss) recognized in OCI	(26)	(8)
Net realized gain (loss) reclassified from OCI	69	(37)
Interest expense reclassified from OCI	(4)	(4)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	$ (91)	$ 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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