Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May. 30, 2015	Feb. 28, 2015	Nov. 29, 2014	Aug. 30, 2014	May. 31, 2014	Feb. 27, 2016	Feb. 28, 2015	Mar. 01, 2014
Numerator for income per share:
Net income	$ 65,617	$ 59,543	$ 21,469	$ 18,836	$ 1,835,032	$ 104,846	$ 127,849	$ 41,446	$ 165,465	$ 2,109,173	$ 249,414
Accretion of redeemable preferred stock											(77)
Cumulative preferred stock dividends											(8,318)
Conversion of Series G and H preferred stock											(25,603)
Income attributable to common stockholders-basic									165,465	2,109,173	215,416
Add back-interest on convertible notes										5,456	5,456
Income attributable to common stockholders-diluted									$ 165,465	$ 2,114,629	$ 220,872
Denominator:
Basic weighted average shares									1,024,377,000	971,102,000	922,199,000
Outstanding options and restricted shares, net (in shares)									17,985,000	21,967,000	32,093,000
Convertible notes (in shares)										24,792,000	24,800,000
Diluted weighted average shares									1,042,362,000	1,017,861,000	979,092,000
Basic income per share (in dollars per share)	$ 0.06	$ 0.06	$ 0.02	$ 0.02	$ 1.88	$ 0.11	$ 0.13	$ 0.04	$ 0.16	$ 2.17	$ 0.23
Diluted income per share (in dollars per share)	$ 0.06	$ 0.06	$ 0.02	$ 0.02	$ 1.79	$ 0.10	$ 0.13	$ 0.04	$ 0.16	$ 2.08	$ 0.23
Stock options
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income (loss) per share									3,464,000	2,777,000	4,044,000