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Financial Instruments Fair Value of Derivatives (Details) - USD ($) $ in Millions		Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		$ 37	$ 55	$ 120
Derivative Asset, Counterparty and Cash Collateral Netting	[1]	(20)	(40)	(57)
Derivative Asset, Net		17	15	63
Derivative Liability, Gross		93	135	65
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	(20)	(40)	(56)
Derivative Liability, Net		73	95	9
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		1	15	19
Derivative Asset, Counterparty and Cash Collateral Netting	[1]	0	0	0
Derivative Asset, Net		1	15	19
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Gross		21	38
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	0	0
Derivative Liability, Net		21	38
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		36	40	101
Derivative Asset, Counterparty and Cash Collateral Netting	[1]	(20)	(40)	(57)
Derivative Asset, Net		16	0	44
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Gross		72	97	65
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	(20)	(40)	(56)
Derivative Liability, Net		$ 52	$ 57	$ 9
[1] Counterparty and cash collateral amounts represent the estimated net settlement amount when applying netting and set-off rights included in master netting arrangements between the company and its counterparties and the payable or receivable for cash collateral held or placed with the same counterparty.

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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 not subject to a master netting arrangement and elected not to be offset.

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