Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Oct. 29, 2017	Oct. 30, 2016	Oct. 29, 2017	Oct. 30, 2016
Numerator:
Net income		$ 838	$ 542	$ 1,928	$ 1,012
Denominator:
Basic weighted average shares		603	538	597	536
Dilutive impact of outstanding securities:
Equity awards		23	27	24	25
1% Convertible Senior Notes		2	45	7	42
Warrants issued with the 1% Convertible Senior Notes		0	43	5	33
Weighted average shares used in diluted per share computation		628	653	633	636
Net income per share:
Basic net income per share	[1]	$ 1.39	$ 1.01	$ 3.23	$ 1.89
Diluted net income per share	[2]	$ 1.33	$ 0.83	$ 3.05	$ 1.59
Equity awards excluded from diluted net income per share because their effect would have been anti-dilutive		3	7	4	9
Stated interest rate, Convertible Notes		1.00%		1.00%
Conversion price - Convertible Notes		$ 20.0410		$ 20.0410
Average stock price		$ 176.20		$ 142.18

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

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