Fair Value Measurements and Derivatives - Derivatives Not Designated as Hedging Instruments (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)
Cost of Sales [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in income on foreign currency derivatives not designated as hedging instruments	$ (5)
Other Income (Expense), Net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (loss) recognized in income on foreign currency derivatives not designated as hedging instruments	$ (5)

Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

Name:	us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration