Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Income	$ 20,899	$ 21,048	$ 21,053
Weighted average shares of common stock outstanding-basic	4,199	4,417	4,611
Dilutive effect of employee equity incentive plans (shares)	33	41	50
Dilutive effect of convertible debt (shares)	0	15	40
Weighted average shares of common stock outstanding-diluted	4,232	4,473	4,701
Earnings per share—basic	$ 4.98	$ 4.77	$ 4.57
Earnings per share—diluted	$ 4.94	$ 4.71	$ 4.48