Loss Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 01, 2012	Aug. 27, 2011	Sep. 01, 2012	Aug. 27, 2011
Numerator for loss per share:
Net loss	$ (38,765)	$ (92,254)	$ (66,853)	$ (155,336)
Accretion of redeemable preferred stock	(26)	(26)	(51)	(51)
Cumulative preferred stock dividends	(2,612)	(2,461)	(5,186)	(4,886)
Loss attributable to common stockholders-basic	(41,403)	(94,741)	(72,090)	(160,273)
Loss attributable to common stockholders-diluted	$ (41,403)	$ (94,741)	$ (72,090)	$ (160,273)
Denominator:
Basic weighted average shares	889,645	885,621	888,573	884,768
Diluted weighted average shares	889,645	885,621	888,573	884,768
Basic and diluted loss per share (in dollars per share)	$ (0.05)	$ (0.11)	$ (0.08)	$ (0.18)
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share	140,528	132,792	140,528	132,792
Stock options
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share	83,591	77,713	83,591	77,713
Convertible preferred stock
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted loss per share	32,137	30,279	32,137	30,729
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	24,800	24,800
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			12,856	12,407