Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Earnings Per Share [Abstract]
Net income	$ 4,516	$ 3,378	$ 10,288	$ 6,754
Weighted average shares of common stock outstanding—basic	4,688	4,734	4,707	4,728
Dilutive effect of employee equity incentive plans (shares)	34	47	43	54
Dilutive effect of convertible debt (shares)	99	96	99	90
Weighted average shares of common stock outstanding—diluted	4,821	4,877	4,849	4,872
Basic earnings per share of common stock (in dollars per share)	$ 0.96	$ 0.71	$ 2.19	$ 1.43
Diluted earnings per share of common stock (in dollars per share)	$ 0.94	$ 0.69	$ 2.12	$ 1.39