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Fair Value Measurements and Derivatives - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Settlements of undesignated derivatives				$ 20
Interest Rate Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 0	$ 0		0
Fair value adjustment to the carrying amount of the December 2024 Notes	5	5		5
Interest Rate Contract [Member] \| Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 425	425		425
Forward Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum remaining maturity of foreign currency derivatives	15 months
Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 473	473		473	$ 1,007
Foreign Exchange Forward [Member] \| Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	349	349		349
Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,081	1,081		1,081	$ 1,097
Currency Swap [Member] \| Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	1,081	1,081		1,081
Other Expense, Net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on undesignated foreign currency derivative		(3)		(15)
Swedish krona [Member] \| Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3	3		3
Swedish krona [Member] \| Foreign Exchange Forward [Member] \| Cash Flow Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	3	3		3
Swedish krona [Member] \| Other Expense, Net [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Loss on undesignated foreign currency derivative			$ (13)
Not Designated as Hedging Instrument [Member] \| Foreign Exchange Forward [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	124	124		124
Not Designated as Hedging Instrument [Member] \| Currency Swap [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 0	$ 0		$ 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