Derivatives and Hedging - Net Investments in Foreign Operations Risk Management Narrative (Details) - Net Investment Hedging $ in Millions	3 Months Ended
Mar. 31, 2021 EUR (€)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Derivatives, Fair Value
European denominated commercial paper \| €	€ 0
Non-derivative hedging instrument, unrealized gain \| $		$ 29	$ 29

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