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, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Financial Instruments Owned and Pledged as Collateral [Line Items]
Net realized gains (losses)	$ 283	$ 198	$ 327	$ 201
Interest expense reclassified from OCI	197	192	559	552
Designated as Hedging Instrument | Fair Value Hedging | Currency Swap [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain (loss) recognized in OCI	(17)	42	98	(12)
Net realized gains (losses)	(9)	63	229	14
Interest expense reclassified from OCI	(5)	(3)	(14)	(11)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	$ (3)	$ (18)	$ (117)	$ (15)