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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)

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