Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 15, 2018	Oct. 28, 2018	Oct. 29, 2017	Oct. 28, 2018	Oct. 29, 2017	Nov. 05, 2018	Jan. 28, 2018
Equity, Class of Treasury Stock [Line Items]
Shares repurchased during period (in shares)		1,000,000		4,000,000
Shares repurchased during period		$ 200		$ 855
Dividends paid		$ 91		$ 273	$ 250
Cash dividends declared (in dollars per share)		$ 0.15	$ 0.14	$ 0.45	$ 0.42
Aggregated number of shares repurchased under stock repurchase program (in shares)		255,000,000		255,000,000
Aggregated cost of shares repurchased		$ 6,360		$ 6,360
Preferred stock outstanding (in shares)		0		0			0
Authorized number of shares of common stock (in shares)		2,000,000,000.00		2,000,000,000.00
Par value of common stock (in dollars per share)		$ 0.001		$ 0.001
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Cash dividends declared (in dollars per share)	$ 0.16
Shares authorized under share repurchase program	$ 7,000
Remaining authorized repurchase amount						$ 7,940