Shareholders' Equity (Summary Of Share Repurchase Activity) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Share Repurchase Program [Line Items]
Capacity beginning balance	$ 1,075	$ 670	$ 393
Shares repurchased (in shares)	19.1	8.9	9.1
Shares repurchased, average price per share (in dollars per share)	$ 63	$ 66	$ 57
Shares repurchased (amount)	$ (1,191)	$ (595)	$ (523)
Capacity ending balance	811	1,075	670
2013 Program [Member]
Share Repurchase Program [Line Items]
Share repurchase authorization			$ 800
Expiration of unused capacity in March 2015	(73)
2014 Program [Member]
Share Repurchase Program [Line Items]
Share repurchase authorization		$ 1,000
Capacity ending balance	0
2015 Program [Member]
Share Repurchase Program [Line Items]
Share repurchase authorization	$ 1,000