Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Earnings Per Share [Abstract]
Net income	$ 6,823	$ 4,276	$ 15,245	$ 15,042
Weighted average shares of common stock outstanding—basic	4,061	4,188	4,055	4,233
Dilutive effect of employee equity incentive plans (shares)	25	23	34	36
Weighted average shares of common stock outstanding—diluted	4,086	4,211	4,089	4,269
Earnings per share - Basic (in dollars per share)	$ 1.68	$ 1.02	$ 3.76	$ 3.55
Earnings per share - Diluted (in dollars per share)	$ 1.67	$ 1.02	$ 3.73	$ 3.52