Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
	Jul. 30, 2017	Jul. 30, 2017	Jul. 31, 2016
Notes to financial statements [Abstract]
Stock Repurchased During Period, Shares	5	5
Stock Repurchased During Period, Value	$ 758	$ 758
Payments of Dividends	$ 84	$ 166	$ 124
Aggregated number of shares repurchased under stock repurchase program	250	250
Aggregated cost of shares repurchased	$ 5,350	$ 5,350
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 1,970	$ 1,970
Authorized number of shares of common stock	2,000	2,000
Par value of common stock	$ 0.001	$ 0.001