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Derivatives Balance Sheet Location (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Debt Instrument, Fair Value Disclosure $ 342 $ 390
Net Investment Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative, Fair Value, Net $ 15