Other Financial Data (Changes in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period			$ (96)
Total other comprehensive loss, net of tax	$ (43)	$ (72)	(22)	$ (130)
Balance at end of period	(678)		(678)
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			(22)
Balance at end of period	(1,888)	(1,985)	(1,888)	(1,985)
Foreign Currency Translation Adjustments:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(253)	(230)	(266)	(204)
Other comprehensive income (loss) before reclassification adjustment	(98)	7	(84)	(18)
Tax (expense) benefit	0	0	(1)	(1)
Total other comprehensive loss, net of tax	(98)	7	(85)	(19)
Balance at end of period	(351)	(223)	(351)	(223)
Available-for-Sale Securities:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	1	11	(3)	44
Other comprehensive income (loss) before reclassification adjustment	(2)	6	(2)	(1)
Other comprehensive income (loss) before reclassification adjustment, net of tax	(1)	4	(1)	0
Reclassification adjustment	0	0	6	(46)
Tax expense (benefit)	0	0	(2)	17
Reclassification adjustment, net of tax	0	0	4	(29)
Tax (expense) benefit	1	(2)	1	1
Total other comprehensive loss, net of tax	(1)	4	3	(29)
Balance at end of period	0	15	0	15
Defined Benefit Plans:
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	(1,593)	(1,694)	(1,597)	(1,695)
Other comprehensive income (loss) before reclassification adjustment	53	(53)	53	(53)
Other comprehensive income (loss) before reclassification adjustment, net of tax	37	(53)	37	(53)
Tax expense (benefit)	8	0	8	(1)
Reclassification adjustment, net of tax	19	(30)	23	(29)
Tax (expense) benefit	(16)	0	(16)	0
Total other comprehensive loss, net of tax	56	(83)	60	(82)
Balance at end of period	(1,537)	(1,777)	(1,537)	(1,777)
Reclassification adjustment - Actuarial net losses into Selling, general, and administrative expenses
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	18	18	28	36
Reclassification adjustment - Prior service benefits into Selling, general, and administrative expenses
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	(7)	(16)	(13)	(32)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) of Settlement and Curtailments Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Reclassification adjustment	$ 0	$ (32)	$ 0	$ (32)