Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Earnings Per Share [Abstract]
Net income	$ 2,808	$ 1,330	$ 5,772	$ 3,376
Weighted average shares of common stock outstanding—basic	4,710	4,729	4,717	4,725
Dilutive effect of employee equity incentive plans (shares)	36	49	48	57
Dilutive effect of convertible debt (shares)	99	88	99	88
Weighted average shares of common stock outstanding—diluted	4,845	4,866	4,864	4,870
Basic earnings per share of common stock (in dollars per share)	$ 0.60	$ 0.28	$ 1.22	$ 0.71
Diluted earnings per share of common stock (in dollars per share)	$ 0.58	$ 0.27	$ 1.19	$ 0.69