Derivative Instruments - Fair Value of Derivative Contracts (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative assets	$ 681	$ 347
Derivative liabilities	31	23
Total fair value of derivative instruments	650	324
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Assets \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	51	36
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Assets \| Net Investment Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	4	0
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Assets \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	19	15
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	7	2
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Liabilities \| Net Investment Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	1	2
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	21	15
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	20	19
Warrant \| Designated as Hedging Instrument \| Other Assets \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	586	281
Interest Rate Contract \| Designated as Hedging Instrument \| Other Current Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	1	0
Interest Rate Contract \| Designated as Hedging Instrument \| Other Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 2	$ 0

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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