Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Nov. 26, 2011	Nov. 26, 2011 Carrying amount	Feb. 26, 2011 Carrying amount	Nov. 26, 2011 Fair value	Feb. 26, 2011 Fair value
Financial instruments
Variable rate indebtedness		$ 1,567,250	$ 1,425,020	$ 1,471,560	$ 1,386,861
Fixed rate indebtedness		$ 4,610,537	$ 4,654,548	$ 4,320,969	$ 4,544,974
Reference rate for borrowings under the credit facilities	LIBOR

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

No definition available.

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