CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 27, 2019	Oct. 28, 2018	Oct. 27, 2019	Oct. 28, 2018
Income Statement [Abstract]
Revenue	$ 3,014	$ 3,181	$ 7,813	$ 9,511
Cost of revenue	1,098	1,260	3,060	3,547
Gross profit	1,916	1,921	4,753	5,964
Operating expenses
Research and development	712	605	2,091	1,729
Sales, general and administrative	277	258	806	725
Total operating expenses	989	863	2,897	2,454
Income from operations	927	1,058	1,856	3,510
Interest income	45	37	137	94
Interest expense	(13)	(15)	(39)	(44)
Other, net	0	1	0	12
Total other income (expense)	32	23	98	62
Income before income tax	959	1,081	1,954	3,572
Income tax expense (benefit)	60	(149)	109	(3)
Net income	$ 899	$ 1,230	$ 1,845	$ 3,575
Net income per share:
Basic (in dollars per share)	$ 1.47	$ 2.02	$ 3.03	$ 5.88
Diluted (in dollars per share)	$ 1.45	$ 1.97	$ 2.99	$ 5.71
Weighted average shares used in per share computation:
Basic (in shares)	610	609	609	608
Diluted (in shares)	618	625	617	626