Derivative Instruments - Fair Value of Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 1,113	$ 345
Derivative Liabilities	46	20
Total fair value of derivative instruments	1,067	325
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	23	13
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	25	16
Cash Flow Hedging \| Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	12	36
Cash Flow Hedging \| Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	14	15
Cash Flow Hedging \| Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	17	2
Cash Flow Hedging \| Interest Rate Contract \| Designated as Hedging Instrument \| Other Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	13	0
Cash Flow Hedging \| Interest Rate Contract \| Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1	0
Cash Flow Hedging \| Interest Rate Contract \| Designated as Hedging Instrument \| Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1	0
Net Investment Hedging \| Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	2	2
Fair Value Hedging \| Warrant \| Designated as Hedging Instrument \| Warrant Asset
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 1,051	$ 281

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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