Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income	$ 6,398	$ 4,516	$ 15,858	$ 10,288
Weighted average shares of common stock outstanding – basic	4,574	4,688	4,632	4,707
Dilutive effect of employee equity incentive plans (shares)	40	34	52	43
Dilutive effect of convertible debt (shares)	34	99	44	99
Weighted average shares of common stock outstanding – diluted	4,648	4,821	4,728	4,849
Earnings per share - Basic (in dollars per share)	$ 1.40	$ 0.96	$ 3.42	$ 2.19
Earnings per share - Diluted (in dollars per share)	$ 1.38	$ 0.94	$ 3.35	$ 2.12