Other Financial Data - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ (952)
Total other comprehensive income, net of tax	53	$ 21
Balance at end of period	(1,037)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(2,317)
Total other comprehensive income, net of tax	53
Balance at end of period	(2,264)	(1,845)
Foreign Currency Translation Adjustments:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(494)	(266)
Other comprehensive income before reclassification adjustment	37	14
Tax expense	(3)	(1)
Total other comprehensive income, net of tax	34	13
Balance at end of period	(460)	(253)
Available-for-Sale Securities:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	0	(3)
Reclassification adjustment	0	6
Tax benefit	0	(2)
Total other comprehensive income, net of tax	0	4
Balance at end of period	0	1
Defined Benefit Plans:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(1,823)	(1,597)
Tax benefit	(2)	(1)
Total other comprehensive income, net of tax	19	4
Balance at end of period	(1,804)	(1,593)
Reclassification adjustment - Actuarial net losses into Selling, general, and administrative expenses
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	16	10
Reclassification adjustment - Prior service benefits into Selling, general, and administrative expenses
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	(4)	(5)
Reclassification adjustment - Non-U.S. pension settlement loss into Other charges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	$ 9	$ 0