Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 11,420	$ 11,704	$ 9,620
Weighted average shares of common stock outstanding-basic	4,742	4,901	4,970
Dilutive effect of employee equity incentive plans (shares)	64	75	68
Dilutive effect of convertible debt (shares)	88	80	59
Weighted average shares of common stock outstanding-diluted	4,894	5,056	5,097
Basic earnings per share of common stock	$ 2.41	$ 2.39	$ 1.94
Diluted earnings per share of common stock	$ 2.33	$ 2.31	$ 1.89
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (shares)	2	10	55