Pension, Postretirement Health Care and Other Benefits (Details 2) - Prepaid forward contracts - USD ($) $ / shares in Units, shares in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014	Jan. 31, 2015
Prepaid Forward Contracts on Target Common Stock
Change in fair value for contracts indexed to Target common stock, recognized in earnings, pretax	$ 1,000,000	$ 5,000,000	$ 4,000,000	$ 2,000,000
Payments for derivative instrument, investing activities			$ 0	$ 0
Number of Shares	0.4	0.7	0.4	0.7	0.5
Contractual Price Paid per Share			$ 41.13	$ 42.88	$ 41.11
Contractual Fair Value	$ 36,000,000	$ 40,000,000	$ 36,000,000	$ 40,000,000	$ 38,000,000
Total Cash Investment	$ 18,000,000	$ 29,000,000	$ 18,000,000	$ 29,000,000	$ 21,000,000