Fair Value Measurements (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 29, 2018	Jun. 29, 2018	Dec. 31, 2017
Liabilities [Abstract]
Contingent consideration	$ 31	$ 27	$ 31
Business Combination, Contingent Consideration, Liability [Abstract]
Balance at beginning of period	31
Acquisitions and investments	10
Cash payments	(2)
Changes in fair value of contingent consideration, net	(12)
Balance at end of period	27
Recurring [Member] | Level 1 [Member]
Assets [Abstract]
Cash equivalents		955	310
Derivatives (foreign currency forward contracts)		0	0
Total assets		955	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)		3	11
Total assets		3	11
Liabilities [Abstract]
Derivatives (foreign currency forward contracts)		8	1
Contingent consideration	0	0	0
Total liabilities		8	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	27	31
Total liabilities		$ 27	$ 31
Business Combination, Contingent Consideration, Liability [Abstract]
Balance at beginning of period	31
Balance at end of period	$ 27