Commitments, Contingencies, And Guarantees (Schedule of Net Investment Hedges, Statements of Financial Performance and Financial Position, Location) (Details) - Designated as Hedging Instrument - Net Investment Hedging - 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]
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	$ 42	$ (103)	$ (93)	$ (36)
Notional Amount of Nonderivative Instruments			1,200
INA CNH Term Loan Due April 2028 [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(11)	0	(17)	0
Currency Swap [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Gain (loss) recognized in OCI	61	(98)	(53)	(25)
Interest income reclassified from OCI	8	5	23	11
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	$ 53	$ (103)	$ (76)	$ (36)