Financial Instruments Fair Value of Derivatives (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		$ 55	$ 25
Derivative Asset, Counterparty and Cash Collateral Netting	[1]	(40)	(18)
Derivative Asset, Net		15	7
Derivative Liability, Gross		135	43
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	(40)	(16)
Derivative Liability, Net		95	27
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		40	25
Derivative Asset, Counterparty and Cash Collateral Netting	[1]	(40)	(18)
Derivative Asset, Net		0	7
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Gross		97	43
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	(40)	(16)
Derivative Liability, Net		57	$ 27
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		15
Derivative Asset, Net		15
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	0
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued and Other Current Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Liability, Gross		38
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	0
Derivative Liability, Net		$ 38

[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.