Share Repurchases - Additional Information (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015	Feb. 25, 2016	Jan. 30, 2016	Feb. 26, 2015	Oct. 16, 2014
Disclosure Share Repurchases Additional Information [Abstract]
Stock Repurchase Program, Authorized Amount					$ 1,000		$ 1,000	$ 500
Share repurchases, remaining amount	$ 1,000		$ 1,000			$ 302
Stock Repurchase Program Amount Not Paid	$ 0	$ 0	$ 0	$ 0		$ 0
Number of shares repurchased	0.0	6.2	0.0	21.8