Fair Value Measurements and Derivatives - Additional Information (Details) - USD ($)		3 Months Ended
	Sep. 30, 2018	Mar. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Settlements of undesignated derivatives		$ 20,000,000
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		0
Fair value adjustment to the carrying amount of the December 2024 Notes		5,000,000
Forward Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum remaining maturity of foreign currency derivatives	18 months
Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		516,000,000	$ 1,007,000,000
Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		375,000,000
Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		1,090,000,000	$ 1,097,000,000
Currency Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		1,090,000,000
Other Expense, Net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on undesignated foreign currency derivative		(13,000,000)
Swedish krona [Member] | Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		11,000,000
Swedish krona [Member] | Foreign Exchange Forward [Member] | Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		11,000,000
Swedish krona [Member] | Other Expense, Net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on undesignated foreign currency derivative		(13,000,000)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		141,000,000
Not Designated as Hedging Instrument [Member] | Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		0
Not Designated as Hedging Instrument [Member] | Swedish krona [Member] | Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Settlements of undesignated derivatives		$ 21,000,000