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Derivative Instruments (Hedges of Net Investments in Foreign Operations) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Derivatives, Fair Value [Line Items] |  |  |  |
Net Derivatives Gains (Losses) Deferred in AOCI | $ (12) | $ (40) | $ (27) | $ 55
Currency Swap [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Net Derivatives Gains (Losses) Deferred in AOCI | (2) | (6) | (3) | 9
Foreign Currency Forwards |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Net Derivatives Gains (Losses) Deferred in AOCI | $ (10) | $ (34) | $ (24) | $ 46

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- Definition The current period gain (loss) recognized in other comprehensive income related to the effective portion of derivatives designated in cash flow hedges. + References No definition available. + Details
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- Details
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- Details
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