Fair Value Measurements (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 30, 2018	Dec. 31, 2017
Liabilities [Abstract]
Contingent consideration	$ 31	$ 34	$ 31
Business Combination, Contingent Consideration, Liability [Abstract]
Balance at beginning of period	31
Acquisitions and investments	6
Changes in fair value of contingent consideration, net	(3)
Balance at end of period	34
Recurring [Member] | Level 1 [Member]
Assets [Abstract]
Cash equivalents		12	310
Derivatives (foreign currency forward contracts)		0	0
Total assets		12	310
Liabilities [Abstract]
Derivatives (foreign currency forward contracts)		0	0
Contingent consideration	0	0	0
Total liabilities		0	0
Business Combination, Contingent Consideration, Liability [Abstract]
Balance at beginning of period	0
Balance at end of period	0
Recurring [Member] | Level 2 [Member]
Assets [Abstract]
Cash equivalents		0	0
Derivatives (foreign currency forward contracts)		11	11
Total assets		11	11
Liabilities [Abstract]
Derivatives (foreign currency forward contracts)		4	1
Contingent consideration	0	0	0
Total liabilities		4	1
Business Combination, Contingent Consideration, Liability [Abstract]
Balance at beginning of period	0
Balance at end of period	0
Recurring [Member] | Level 3 [Member]
Assets [Abstract]
Cash equivalents		0	0
Derivatives (foreign currency forward contracts)		0	0
Total assets		0	0
Liabilities [Abstract]
Derivatives (foreign currency forward contracts)		0	0
Contingent consideration	31	34	31
Total liabilities		$ 34	$ 31
Business Combination, Contingent Consideration, Liability [Abstract]
Balance at beginning of period	31
Balance at end of period	$ 34