Accumulated Other Comprehensive Loss, Excluding Noncontrolling Interests (Detail) $ in Millions	3 Months Ended
	Apr. 03, 2016 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	$ 64,720	[1]
Other comprehensive income/(loss)	2	[2]
Balance, April 3, 2016	63,068	[1]
Foreign currency translation adjustments attributable to noncontrolling interests	(6)
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(9,522)
Balance, April 3, 2016	(9,520)
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(5,863)
Other comprehensive income/(loss)	87	[2]
Balance, April 3, 2016	(5,776)
Derivative Financial Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	421
Other comprehensive income/(loss)	(504)	[2]
Balance, April 3, 2016	(83)
Cash flow hedge gain (loss) to be reclassified within twelve months	(144)
Available-For-Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(227)
Other comprehensive income/(loss)	296	[2]
Balance, April 3, 2016	69
Actuarial Gains/(Losses) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(4,733)
Other comprehensive income/(loss)	148	[2]
Balance, April 3, 2016	(4,585)
Prior Service (Costs)/Credits and Other [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	880
Other comprehensive income/(loss)	(25)	[2]
Balance, April 3, 2016	$ 855

[1] Amounts may not add due to rounding.

[2] Amounts do not include foreign currency translation adjustments attributable to noncontrolling interests of $6 million loss for the first three months of 2016.