Accumulated Other Comprehensive Loss, Excluding Noncontrolling Interests (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021		Sep. 27, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		$ 70,315	$ 64,570	$ 63,473		$ 63,447
Other comprehensive income/(loss)		(894)	1,299	(338)		(329)
Ending balance		75,967	65,503	75,967		65,503
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		(4,758)	(6,983)	(5,310)	[1]	(5,367)
Other comprehensive income/(loss)		(891)	1,296	(338)	[2]	(319)
Ending balance		(5,649)	$ (5,687)	(5,649)		$ (5,687)
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]			(5,450)
Other comprehensive income/(loss)	[2]			(336)
Ending balance		(5,787)		(5,787)
Derivative Financial Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]			(428)
Other comprehensive income/(loss)	[2]			388
Ending balance		(40)		(40)
Available-For-Sale Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]			116
Other comprehensive income/(loss)	[2]			(262)
Ending balance		(146)		(146)
Prior Service (Costs)/Credits and Other [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	[1]			452
Other comprehensive income/(loss)	[2]			(127)
Ending balance		$ 325		$ 325

[1] Amounts include the impact of a change in accounting principle. See Note 1C.

[2] Amounts do not include foreign currency translation adjustments attributable to noncontrolling interests. Foreign currency translation adjustments include net losses related to our equity method investment in the Consumer Healthcare JV (see Note 2B) and net gains related to the impact of our net investment hedging program.