Financial Instruments Fair Value of Derivatives (Details) - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		$ 120	$ 25	$ 36
Derivative Asset, Counterparty and Cash Collateral Netting	[1]	(57)	(18)	(33)
Derivative Asset, Net		63	7	3
Derivative Liability, Gross		65	43	48
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	(56)	(16)	(27)
Derivative Liability, Net		9	27	21
Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		19
Derivative Asset, Counterparty and Cash Collateral Netting		0
Derivative Asset, Net		19
Not Designated as Hedging Instrument [Member] | Foreign Currency Contract [Member] | Other Current Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Asset, Gross		101	25	36
Derivative Asset, Counterparty and Cash Collateral Netting	[1]	(57)	(18)	(33)
Derivative Asset, Net		44	7	3
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		65	43	48
Derivative Liability, Counterparty and Cash Collateral Netting	[1]	(56)	(16)	(27)
Derivative Liability, Net		$ 9	$ 27	$ 21

[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.