Accumulated Other Comprehensive Loss, Excluding Noncontrolling Interests (Detail) $ in Millions	9 Months Ended
	Oct. 02, 2016 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	$ 64,720	[1]
Balance, October 2, 2016	63,306	[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)
Other comprehensive income/(loss)	1,308	[2]
Balance, October 2, 2016	(8,214)
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(5,863)
Other comprehensive income/(loss)	1,016	[2]
Balance, October 2, 2016	(4,847)
Derivative Financial Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	421
Other comprehensive income/(loss)	(578)	[2]
Balance, October 2, 2016	(157)
Available-For-Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(227)
Other comprehensive income/(loss)	522	[2]
Balance, October 2, 2016	295
Cash flow hedge gain (loss) to be reclassified within twelve months	(129)
Actuarial Gains/(Losses) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, December 31, 2015	(4,733)
Other comprehensive income/(loss)	310	[2]
Balance, October 2, 2016	(4,423)
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)	39	[2]
Balance, October 2, 2016	$ 919

[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 nine months of 2016.