Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 28, 2019	Apr. 29, 2018	Jan. 27, 2019
Equity [Abstract]
Dividends paid	$ 97	$ 91
Aggregated number of shares repurchased under stock repurchase program (in shares)	260,000,000
Aggregated cost of shares repurchased	$ 7,080
Remaining authorized repurchase amount	$ 7,240
Preferred stock outstanding (in shares)	0		0
Authorized number of shares of common stock (in shares)	2,000,000,000.00
Par value of common stock (in dollars per share)	$ 0.001