Other Comprehensive Income (Loss), Reclassification out of Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net	$ (25)	$ (32)	$ 70	$ (119)
Gains (losses) on equity investments, net	35	452	178	437
Income before taxes	4,550	3,924	11,142	9,060
Cost of sales	(5,096)	(5,069)	(15,161)	(15,924)
Research and development	(2,842)	(2,742)	(8,547)	(7,785)
Marketing, general and administrative	(1,979)	(1,970)	(6,087)	(6,082)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			(154)
Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before taxes	9	88	127	24
Unrealized holding gains (losses) on available-for-sale investments [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net	9	0	7	3
Gains (losses) on equity investments, net	9	130	132	139
Income before taxes	18	130	139	142
Unrealized holding gains (losses) on derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before taxes	3	(14)	21	(37)
Unrealized holding gains (losses) on derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Currency Forwards [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(5)	(19)	(10)	(47)
Research and development	8	7	26	15
Marketing, general and administrative	2	(2)	7	(6)
Unrealized holding gains (losses) on derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Other Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(2)	0	(2)	1
Prior service credits (costs) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification out of Accumulated Other Comprehensive Income (Loss), Prior Service (Credits) Costs	(2)	(2)	(4)	(4)
Actuarial gains (losses) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification out of Accumulated Other Comprehensive Income (Loss), Actuarial Gains (Losses)	(10)	(26)	(29)	(77)
Amortization of pension and postretirement benefit components [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before taxes	$ (12)	$ (28)	$ (33)	$ (81)