Derivatives and Hedging - Net Investments in Foreign Operations Risk Management Narrative (Details) - Net Investment Hedging € in Millions, $ in Millions	Mar. 31, 2020 EUR (€)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 USD ($)
Derivatives, Fair Value
European denominated commercial paper	€ 101	$ 112	€ 101	$ 112
Effective portion of loss reclassified from Accumulated OCI		$ 30		$ 29

Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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