Derivative and Other Financial Instruments - Narrative (Details) € in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Mar. 31, 2019 EUR (€)	Mar. 31, 2019 USD ($)	Nov. 30, 2018 EUR (€)	Nov. 30, 2018 USD ($)	Jan. 31, 2018 EUR (€)	Jan. 31, 2018 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Objective for using derivative instruments	The Company’s objective in managing exposure to market risk is to limit the impact on earnings and cash flow.
Loss expected to be reclassified to earnings	$ 12,000,000
Loss, net of tax, expected to be reclassified to earnings	10,000,000
Reclassification of anticipated transactions that were no longer considered probable	$ 0	$ 0
Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of derivative						€ 768	$ 875,000,000
Interest rate						4.75%	4.75%
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, remaining maturity range	1 month
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, remaining maturity range	36 months
Derivatives not designated as hedges | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of derivative			$ 796,000,000		$ 745,000,000
Derivatives in fair value hedges | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of derivative			74,000,000		115,000,000
Derivatives in fair value hedges | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Cumulative amount of fair value hedging adjustment included in the carrying about of the hedged assets			1,000,000		1,000,000
Derivatives in fair value hedges | Designated as Hedging Instrument | Foreign exchange
Derivative Instruments, Gain (Loss) [Line Items]
Losses from foreign exchange contracts designated as fair value hedges (less than)	$ (1,000,000)	1,000,000
Derivatives designated as net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Carrying amount of hedged net investment				€ 1,178	$ 1,322,000,000
Derivatives designated as net investment hedges | Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Loss on net investment hedge settlements	31,000,000		59,000,000
Loss on net investment hedge settlements, net of tax	8,000,000		$ 36,000,000
Derivatives designated as net investment hedges | Cross Currency Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of derivative								€ 718	$ 875,000,000
Derivatives designated as net investment hedges | Cross Currency Interest Rate Contract on U.S. Notional Amount
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate				4.75%	4.75%
Derivatives designated as net investment hedges | Cross Currency Interest Rate Contract on Euro Notional Amount
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate				2.50%	2.50%	1.84%	1.84%
Derivatives designated as net investment hedges | Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Loss on net investment hedge settlements	28,000,000	35,000,000
Loss on net investment hedge settlements, net of tax	$ 28,000,000	$ 31,000,000