Derivative Financial Instruments, Fair Value on Consolidated Balance Sheet (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jun. 29, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Pre-tax gain on foreign currency forward contracts	$ 1	$ 1
Estimated net amount of existing gains expected to be reclassified into income within the next 12 months			$ 5
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets			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	11
Other Current Assets [Member] | Contingent Consideration [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets			0	0
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets			0	0
Other Assets [Member] | Foreign Currency Forward Contracts [Member] | Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets			0	0
Other Assets [Member] | Contingent Consideration [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, assets			0	0
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities			12	1
Other Current Liabilities [Member] | Foreign Currency Forward Contracts [Member] | Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities			6	1
Other Current Liabilities [Member] | Contingent Consideration [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities			6	0
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities			2	0
Other Liabilities [Member] | Foreign Currency Forward Contracts [Member] | Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities			2	0
Other Liabilities [Member] | Contingent Consideration [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total derivative instruments, liabilities			$ 0	$ 0