Other Financial Data (Changes in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ (96)
Total other comprehensive loss, net of tax	21	$ (58)
Balance at end of period	(137)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(1,866)
Total other comprehensive loss, net of tax	21
Balance at end of period	(1,845)	(1,913)
Foreign Currency Translation Adjustments:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(266)	(204)
Other comprehensive income (loss) before reclassification adjustment	14	(27)
Tax (expense) benefit	(1)	1
Total other comprehensive loss, net of tax	13	(26)
Balance at end of period	(253)	(230)
Available-for-Sale Securities:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(3)	44
Other comprehensive income (loss) before reclassification adjustment	0	(7)
Other comprehensive loss before reclassification adjustment, net of tax	0	(4)
Reclassification adjustment	6	(46)
Tax expense (benefit)	(2)	17
Reclassification adjustment, net of tax	4	(29)
Tax (expense) benefit	0	3
Total other comprehensive loss, net of tax	4	(33)
Balance at end of period	1	11
Defined Benefit Plans:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(1,597)	(1,695)
Tax expense (benefit)	(1)	(1)
Reclassification adjustment, net of tax	4	1
Total other comprehensive loss, net of tax	4	1
Balance at end of period	(1,593)	(1,694)
Reclassification adjustment - Actuarial net losses into Selling, general, and administrative expenses
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	10	19
Reclassification adjustment - Prior service benefits into Selling, general, and administrative expenses
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	$ (5)	$ (17)