Derivative Instruments - Fair Value of Derivative Contracts (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative assets	$ 1,129	$ 1,113
Derivative liabilities	30	46
Total fair value of derivative instruments	1,099	1,067
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Assets \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	22	12
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Assets \| Net Investment Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	1	0
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Assets \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	20	14
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	15	17
Foreign Exchange Contract \| Designated as Hedging Instrument \| Other Current Liabilities \| Net Investment Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	2
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	15	23
Foreign Exchange Contract \| Not Designated as Hedging Instrument \| Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	13	25
Warrant \| Designated as Hedging Instrument \| Warrant Asset \| Fair Value Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	1,015	1,051
Interest Rate Contract \| Designated as Hedging Instrument \| Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative assets	56	0
Interest Rate Contract \| Designated as Hedging Instrument \| Other Current Assets \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative assets	0	13
Interest Rate Contract \| Designated as Hedging Instrument \| Other Current Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	1	1
Interest Rate Contract \| Designated as Hedging Instrument \| Other Liabilities \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 1	$ 1

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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