Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Notes to financial statements [Abstract]
Stock Repurchased During Period, Shares	6
Payments for Repurchase of Common Stock	$ 909	$ 739	$ 587
Dividends paid	$ 341	$ 261	$ 213
Cash dividends declared and paid per common share	$ 0.570	$ 0.485	$ 0.395
Aggregate number of shares repurchased under stock repurchase program	251
Aggregated cost of shares repurchased	$ 5,500
Remaining authorized shares repurchase amount	$ 1,820
Common Stock, Shares Authorized	2,000	2,000
Common stock, par value	$ 0.001	$ 0.001