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Derivative Instruments (Hedges of Net Investments in Foreign Operations) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Foreign Currency Forwards |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Net Derivatives Gains (Losses) Deferred in AOCI | $ 56 | $ (12) | $ (65) | $ 24

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