Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Derivative Instruments (Forward Currency Exchange Contracts) (Details) - Foreign currency exchange forward contracts $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 EUR (€)	Jul. 31, 2019 USD ($)	Nov. 30, 2018 EUR (€)
Derivative [Line Items]
Notional amount	$ 8,088	$ 6,336
Maximum term	1646 days	586 days
Derivative, fair value, net	$ 203	$ 57
Other current assets
Derivative [Line Items]
Derivative asset	185	43
Other noncurrent assets
Derivative [Line Items]
Derivative asset	41	34
Other current liabilities
Derivative [Line Items]
Derivative liability	(21)	(20)
Other noncurrent liabilities
Derivative [Line Items]
Derivative liability	(2)	0
Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	1,113	0	€ 2,400,000,000	$ 1,000	€ 2,250,000,000
Derivative, fair value, net	40	0
Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset	0	0
Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative asset	40	0
Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability	0	0
Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liability	0	0
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	6,174	5,466
Derivative, fair value, net	169	46
Not Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset	180	28
Not Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative asset	0	33
Not Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability	(11)	(15)
Not Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liability	0	0
Cash Flow Hedging \| Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	801	870
Derivative, fair value, net	(6)	11
Cash Flow Hedging \| Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset	5	15
Cash Flow Hedging \| Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative asset	1	1
Cash Flow Hedging \| Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability	(10)	(5)
Cash Flow Hedging \| Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liability	$ (2)	$ 0