Impairment and Litigation Charges (Schedule of Impairment and Litigation Charges) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Impairment and Litigation Charges [Abstract]
Impairment of long-lived assets		$ 6		$ 6
Pension litigation charge	[1]		100		100
Total impairment and litigation charges		$ 6	$ 100	$ 6	$ 100

[1] Included in the thirteen and thirty-nine weeks ended October 31, 2015 is a pre-tax litigation charge of $100 million relating to a pension litigation matter described further in Note 13, Legal Proceedings.