Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Earnings Per Share [Abstract]
Net income	$ 3,361	$ 5,661
Weighted average shares of common stock outstanding—basic	4,056	4,266
Dilutive effect of employee equity incentive plans (shares)	40	46
Weighted average shares of common stock outstanding—diluted	4,096	4,312
Earnings per share - Basic (in dollars per share)	$ 0.83	$ 1.33
Earnings per share - Diluted (in dollars per share)	$ 0.82	$ 1.31