Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Oct. 28, 2018	Oct. 29, 2017	Oct. 28, 2018	Oct. 29, 2017
Numerator:
Net income		$ 1,230	$ 838	$ 3,575	$ 1,928
Denominator:
Basic weighted average shares (in shares)		609	603	608	597
Dilutive impact of outstanding securities:
Equity awards (in shares)		16	23	18	24
1.00% Convertible Senior Notes (in shares)		0	2	0	7
Warrants issued with the 1.00% Convertible Senior Notes (in shares)		0	0	0	5
Diluted weighted average shares (in shares)		625	628	626	633
Net income per share:
Basic (in dollars per share)	[1]	$ 2.02	$ 1.39	$ 5.88	$ 3.23
Diluted (in dollars per share)	[2]	$ 1.97	$ 1.33	$ 5.71	$ 3.05
Equity awards excluded from diluted net income per share because their effect would have been anti-dilutive (in shares)		3	3	4	4

[1] Calculated as net income divided by basic weighted average shares.

[2] Calculated as net income divided by diluted weighted average shares.