Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
		Jul. 29, 2018	Jul. 30, 2017	Jul. 29, 2018	Jul. 30, 2017
Numerator:
Net income		$ 1,101	$ 583	$ 2,345	$ 1,091
Denominator:
Basic weighted average shares (in shares)		607,000,000	597,000,000	607,000,000	595,000,000
Dilutive impact of outstanding securities:
Equity awards (in shares)		18,000,000	26,000,000	19,000,000	26,000,000
1.00% Convertible Senior Notes (in shares)		1,000,000	4,000,000	1,000,000	9,000,000
Warrants issued with the 1.00% Convertible Senior Notes (in shares)		0	6,000,000	0	7,000,000
Diluted weighted average shares (in shares)		626,000,000	633,000,000	627,000,000	637,000,000
Net income per share:
Basic (in dollars per share)	[1]	$ 1.81	$ 0.98	$ 3.86	$ 1.83
Diluted (in dollars per share)	[2]	$ 1.76	$ 0.92	$ 3.74	$ 1.71
Equity awards excluded from diluted net income per share because their effect would have been anti-dilutive (in shares)		0	0	1,000,000	1,000,000
Stated interest rate (as percent)		1.00%		1.00%
Conversion price (in dollars per share)		$ 20.02		$ 20.02
Warrants outstanding (in shares)		0		0

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

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