Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 26, 2020	Apr. 28, 2019
Numerator:
Net income	$ 917	$ 394
Denominator:
Basic weighted average shares (in shares)	614	607
Dilutive impact of outstanding equity awards (in shares)	8	9
Diluted weighted average shares (in shares)	622	616
Net income per share:
Basic (in dollars per share)	$ 1.49	$ 0.65
Diluted (in dollars per share)	$ 1.47	$ 0.64
Equity awards excluded from diluted net income per share because their effect would have been anti-dilutive (in shares)	1	11