Income Taxes (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 27, 2019	Jan. 28, 2018	Jan. 29, 2017
Current income taxes:
Federal		$ 1	$ 464	$ 7
State		0	1	1
Foreign		69	43	34
Total current		70	508	42
Deferred taxes:
Federal		(315)	(376)	199
State		0	0	0
Foreign		0	17	(2)
Total deferred		(315)	(359)	197
Income tax expense (benefit)		(245)	149	239
Income before Income Taxes
Domestic	[1]	1,843	1,600	600
Foreign		2,053	1,596	1,305
Income before income tax		$ 3,896	$ 3,196	$ 1,905

[1] The increase in domestic income is primarily due to jurisdictional allocation of stock-based compensation charges.