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Loss Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 03, 2012	Nov. 26, 2011	Aug. 27, 2011	May 28, 2011	Feb. 26, 2011	Nov. 27, 2010	Aug. 28, 2010	May 29, 2010	Mar. 03, 2012	Feb. 26, 2011	Feb. 27, 2010
Numerator for loss per share:
Net loss	$ (161,250)	$ (51,985)	$ (92,254)	$ (63,082)	$ (205,693)	$ (79,071)	$ (196,976)	$ (73,684)	$ (368,571)	$ (555,424)	$ (506,676)
Accretion of redeemable preferred stock									(102)	(102)	(102)
Cumulative preferred stock dividends									(9,919)	(9,346)	(8,807)
Loss applicable to common stockholders									(378,592)	(564,872)	(515,585)
Loss attributable to common stockholders-diluted									$ (388,848)	$ (564,872)	$ (515,585)
Denominator:
Basic weighted average shares									885,819	882,947	880,843
Diluted weighted average shares									885,819	882,947	880,843
Basic and diluted loss per share									$ (0.43)	$ (0.64)	$ (0.59)
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share									129,793	128,489	164,851
Stock options
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share									73,798	74,298	76,114
Convertible preferred stock
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share									31,195	29,391	27,692
Convertible debt
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share									24,800	24,800	61,045
Restricted shares and restricted stock units
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share									11,506	7,078	5,944