Debt Letters of Credit (Details) (Letter of Credit [Member], USD $) In Millions, unless otherwise specified	Jan. 28, 2012
Letter of Credit [Member]
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 1.8

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant