Comprehensive Income, Reclassification out of Accumulated Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net	$ (32)	$ 27	$ (119)	$ 105
Gains (losses) on equity investments, net	452	53	437	81
Income before taxes	3,924	3,921	9,060	11,669
Cost of sales	(5,069)	(4,942)	(15,924)	(14,530)
Research and development	(2,742)	(2,605)	(7,785)	(7,519)
Marketing, general and administrative	(1,970)	(1,995)	(6,082)	(6,099)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			39
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before taxes	88	11	24	(33)
Unrealized holding gains (losses) on available-for-sale investments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other, net	0	1	3	(11)
Gains (losses) on equity investments, net	130	82	139	120
Income before taxes	130	83	142	109
Unrealized holding gains (losses) on derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before taxes	(14)	(48)	(37)	(70)
Unrealized holding gains (losses) on derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Currency Forwards [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(19)	(10)	(47)	16
Research and development	7	(25)	15	(61)
Marketing, general and administrative	(2)	(13)	(6)	(24)
Unrealized holding gains (losses) on derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Other Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	0	0	1	(1)
Prior service credits (costs) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	(2)	(1)	(4)	(3)
Actuarial gains (losses) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Losses), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	(26)	(23)	(77)	(69)
Amortization of pension and postretirement benefit components [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before taxes	$ (28)	$ (24)	$ (81)	$ (72)