Financing Activities (Detail Of Debt Repayments) (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 30, 2016	May. 02, 2015
Debt repaid	$ 3	$ 3
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

The cash outflow during the period from the repayment of aggregate short-term and long-term debt and payment of capital lease obligations.

No definition available.

Name:	us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration