Cash and Cash Equivalents (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Aug. 27, 2011 day loc	Feb. 26, 2011
Cash and Cash Equivalents
Number of business days for settlement of credit and debit card receivables (in days)	5
Credit and debit card receivables from banks	$ 76.2	$ 61.9

Amount due the Entity as a result of customers utilizing point of sale debit or credit cards in exchange transactions with the entity which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 8, 9

Name:	us-gaap_CreditAndDebitCardReceivablesAtCarryingValue
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant