Financial Instruments - Income Statement (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivatives, Fair Value [Line Items]
Net sales	$ 2,551	$ 2,694	$ 5,117	$ 5,478
Cost of sales	2,038	2,114	4,085	4,307
Selling, general and administrative expenses	212	237	438	490
Other Comprehensive Income (Loss)	5	(138)	4	(78)
Cash Flow Hedging [Member] \| Foreign currency \| Net sales
Derivatives Designated As Net Investment Hedges Under Topic 815 Abstract
Gain (loss) reclassified from accumulated OCI into net income, effective portion, net	(1)	(1)	(2)	(1)
Cash Flow Hedging [Member] \| Foreign currency \| Cost of goods sold
Derivatives Designated As Net Investment Hedges Under Topic 815 Abstract
Gain (loss) reclassified from accumulated OCI into net income, effective portion, net	1	(2)	1	(3)
Cash Flow Hedging [Member] \| Foreign currency \| SG&A expense
Derivatives Designated As Net Investment Hedges Under Topic 815 Abstract
Gain (loss) reclassified from accumulated OCI into net income, effective portion, net	0	0	1	0
Net investment hedge \| Cross Currency Interest Rate Contract [Member] \| Interest expense and finance charges
Derivatives Designated As Net Investment Hedges Under Topic 815 Abstract
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	2	2	5	3
Not Designated as Hedging Instrument [Member] \| Foreign currency \| SG&A expense
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1)	3	(3)	(1)
Other Comprehensive Income (Loss) [Member] \| Cash Flow Hedging [Member] \| Foreign currency
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1)	0	(1)	(6)
Other Comprehensive Income (Loss) [Member] \| Net investment hedge \| Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(4)	14	5	7
Other Comprehensive Income (Loss) [Member] \| Net investment hedge \| Foreign currency denominated debt designated as a net investment hedge [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (7)	$ 32	$ 5	$ 16

Derivatives Designated As Net Investment Hedges Under Topic 815 Abstract.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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