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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Jul. 26, 2019
Foreign Exchange Contract
Derivative [Line Items]
Notional Amount	$ 7,778	$ 6,336
Maximum term in days	586 days	586 days
Derivative, Fair Value, Net	$ 220	$ 57
Foreign Exchange Contract \| Other current assets
Derivative [Line Items]
Derivative assets	196	43
Foreign Exchange Contract \| Other noncurrent assets
Derivative [Line Items]
Derivative assets	44	34
Foreign Exchange Contract \| Other current liabilities
Derivative [Line Items]
Derivative liabilities	(19)	(20)
Foreign Exchange Contract \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	(1)
Foreign Exchange Contract \| Net Investment
Derivative [Line Items]
Notional Amount	804	870	$ 1,000
Derivative, Fair Value, Net	(3)	11
Foreign Exchange Contract \| Net Investment \| Other current assets
Derivative [Line Items]
Derivative assets	7	15
Foreign Exchange Contract \| Net Investment \| Other noncurrent assets
Derivative [Line Items]
Derivative assets	0	1
Foreign Exchange Contract \| Net Investment \| Other current liabilities
Derivative [Line Items]
Derivative liabilities	(9)	(5)
Foreign Exchange Contract \| Net Investment \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	(1)
Foreign Exchange Contract \| Non-Designated
Derivative [Line Items]
Notional Amount	5,874	5,466
Derivative, Fair Value, Net	179	46
Foreign Exchange Contract \| Non-Designated \| Other current assets
Derivative [Line Items]
Derivative assets	189	28
Foreign Exchange Contract \| Non-Designated \| Other noncurrent assets
Derivative [Line Items]
Derivative assets	0	33
Foreign Exchange Contract \| Non-Designated \| Other current liabilities
Derivative [Line Items]
Derivative liabilities	10	15
Foreign Exchange Contract \| Non-Designated \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	0
Net Investment Hedging [Member] \| Net Investment
Derivative [Line Items]
Notional Amount	1,100	0
Derivative, Fair Value, Net	44	0
Net Investment Hedging [Member] \| Net Investment \| Other current assets
Derivative [Line Items]
Derivative assets	0	0
Net Investment Hedging [Member] \| Net Investment \| Other noncurrent assets
Derivative [Line Items]
Derivative assets	44	0
Net Investment Hedging [Member] \| Net Investment \| Other current liabilities
Derivative [Line Items]
Derivative liabilities	0	$ 0
Net Investment Hedging [Member] \| Net Investment \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liabilities	0
Net Investment Hedging [Member] \| Foreign Exchange Contract
Derivative [Line Items]
Notional Amount	$ 2,250