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Derivative Financial Instruments, Fair Value on Consolidated Balance Sheet (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Pre-tax loss on foreign currency forward contracts	$ (3)		$ (2)
Pre-tax gain on foreign currency forward contracts		$ 2		$ 3
Estimated net amount of existing gains expected to be reclassified into income within the next 12 months	3		3
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets	3		3		$ 11
Other Current Assets [Member] \| Foreign Currency Forward Contracts [Member] \| Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets	3		3		11
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets	1		1		0
Other Assets [Member] \| Foreign Currency Forward Contracts [Member] \| Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets	1		1		0
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities	5		5		1
Other Current Liabilities [Member] \| Foreign Currency Forward Contracts [Member] \| Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities	5		5		1
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities	1		1		0
Other Liabilities [Member] \| Foreign Currency Forward Contracts [Member] \| Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities	$ 1		$ 1		$ 0