Accumulated Other Comprehensive Loss, Excluding Noncontrolling Interests (Detail) $ in Millions	6 Months Ended
	Jul. 03, 2016 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	$ 64,720	[1]
Other comprehensive income/(loss)	630	[2]
Balance, July 3, 2016	62,769	[1]
Foreign currency translation adjustments attributable to noncontrolling interests	(1)
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(9,522)
Balance, July 3, 2016	(8,891)
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(5,863)
Other comprehensive income/(loss)	598	[2]
Balance, July 3, 2016	(5,265)
Derivative Financial Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	421
Other comprehensive income/(loss)	(571)	[2]
Balance, July 3, 2016	(150)
Cash flow hedge gain (loss) to be reclassified within twelve months	(79)
Available-For-Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(227)
Other comprehensive income/(loss)	399	[2]
Balance, July 3, 2016	172
Actuarial Gains/(Losses) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(4,733)
Other comprehensive income/(loss)	196	[2]
Balance, July 3, 2016	(4,538)
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)	9	[2]
Balance, July 3, 2016	$ 889

[1] Amounts may not add due to rounding.

[2] Amounts do not include foreign currency translation adjustments attributable to noncontrolling interests of $1 million loss for the first six months of 2016.