Derivatives Income Statement Location (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 9	$ (14)	$ 6	$ (13)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		(2)	0	(4)
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net		2	1	3
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	1	(2)	2	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		1	0	(3)
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net			0	0
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	8	(12)	2	(13)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net			0	0
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net			0	0
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Cost of Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	0	0
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Cost of Sales [Member] | Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	0	0
Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(1)
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	0	0	0	0
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	1	0	2	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	1	0	(1)
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	0	0	0	0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0	0	0	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	0	0	0
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Cost of Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	1	2	1	3
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0	0	0	0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	0	$ 0	$ 0	$ 0
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ (1)