Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 27, 2019	Oct. 28, 2018	Oct. 27, 2019	Oct. 28, 2018
Numerator:
Net income	$ 899	$ 1,230	$ 1,845	$ 3,575
Denominator:
Basic weighted average shares (in shares)	610	609	609	608
Dilutive impact of outstanding equity awards (in shares)	8	16	8	18
Diluted weighted average shares (in shares)	618	625	617	626
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
Equity awards excluded from diluted net income per share because their effect would have been anti-dilutive (in shares)	5	3	11	4