Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 29, 2018	Apr. 30, 2017
Notes to financial statements [Abstract]
Stock Repurchased During Period, Shares	3
Stock Repurchased During Period, Value	$ 655
Payments of Dividends	$ 91	$ 82
Aggregated number of shares repurchased under stock repurchase program	254
Aggregated cost of shares repurchased	$ 6,160
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 1,160
Authorized number of shares of common stock	2,000
Par value of common stock	$ 0.001