Income (Loss) Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 02, 2013	Dec. 01, 2012	Sep. 01, 2012	Jun. 02, 2012	Mar. 03, 2012	Nov. 26, 2011	Aug. 27, 2011	May 28, 2011	Mar. 02, 2013	Mar. 03, 2012	Feb. 26, 2011
Numerator for income (loss) per share:
Net income (loss)	$ 123,087	$ 61,871	$ (38,765)	$ (28,088)	$ (161,250)	$ (51,985)	$ (92,254)	$ (63,082)	$ 118,105	$ (368,571)	$ (555,424)
Accretion of redeemable preferred stock									(102)	(102)	(102)
Cumulative preferred stock dividends									(10,528)	(9,919)	(9,346)
Income (loss) attributable to common stockholders-basic									107,475	(378,592)	(564,872)
Income (loss) attributable to common stockholders-diluted									$ 107,475	$ (378,592)	$ (564,872)
Denominator:
Basic weighted average shares									889,562	885,819	882,947
Outstanding options and restricted shares, net									17,697
Diluted weighted average shares									907,259	885,819	882,947
Basic and diluted income (loss) per share (in dollars per share)									$ 0.12	$ (0.43)	$ (0.64)
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income (loss) per share									68,364	129,793	128,489
Stock options
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income (loss) per share									10,455	73,798	74,298
Convertible preferred stock
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income (loss) per share									33,109	31,195	29,391
Convertible notes
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income (loss) per share									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 income (loss) per share										11,506	7,078