Financing Activities (Detail Of Debt Repayments) (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 30, 2016	Aug. 01, 2015
Debt repaid	$ 3	$ 72
7.5% Senior Debentures Due Two Thousand Fifteen [Member]
Extinguishment of debt	0	69
9.5% Amortizing Debentures due Two Thousand Twenty One [Member]
Extinguishment of debt	2	2
9.75% Amortizing Debentures Due Two Thousand Twenty One [Member]
Extinguishment of debt	$ 1	$ 1