Derivatives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Debt Instrument, Fair Value Disclosure	$ 342		$ 342		$ 390
Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	78		78		40
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(8)	$ 11	(9)	$ 12
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	2	2	4	5
Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount		8		8
Swap [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	300		300		250
Currency Swap [Member]
Derivative [Line Items]
Derivative, Fair Value, Net					6
Designated as Hedging Instrument [Member] | Liability [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, Fair Value, Net					1
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			6
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	1
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			1
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0	(2)	(8)	(8)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	1	0
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			6
Derivative Liability		12		12	(7)
Designated as Hedging Instrument [Member] | Net Investment Hedging [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(9)	13	(1)	20
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(2)	$ (2)	(5)	$ (5)
Derivative, Fair Value, Net	$ 15		$ 15
Currency Swap [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount					$ 250