Interim Financial Results (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended			0 Months Ended
	Feb. 28, 2015	Nov. 29, 2014	Aug. 30, 2014	May 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 31, 2013	Jun. 01, 2013	Feb. 28, 2015	Mar. 01, 2014	Mar. 02, 2013	Oct. 15, 2014	Jul. 02, 2013	May 31, 2012
Revenues	$ 6,847,929	$ 6,692,333	$ 6,522,584	$ 6,465,531	$ 6,597,459	$ 6,357,732	$ 6,278,165	$ 6,293,057	$ 26,528,377	$ 25,526,413	$ 25,392,263
Cost of goods sold	4,892,068	4,769,020	4,628,005	4,662,552	4,711,743	4,557,066	4,461,804	4,472,066	18,951,645	18,202,679	18,073,987
Selling, general and administrative expenses	1,718,327	1,692,437	1,640,524	1,644,354	1,716,671	1,632,299	1,602,931	1,609,261	6,695,642	6,561,162	6,600,765
Lease termination and impairment charges	21,284	8,702	7,111	4,848	17,270	1,672	11,390	10,972	41,945	41,304	70,859
Interest expense	98,442	97,400	100,950	100,820	101,992	102,819	106,716	113,064	397,612	424,591	515,421
Loss on debt retirements, net		18,512				271	62,172		18,512	62,443	140,502
(Gain) loss on sale of assets, net	(1,259)	(455)	(1,715)	(370)	412	(9,331)	(1,885)	(5,180)	(3,799)	(15,984)	(16,776)
Total costs and expenses	6,728,862	6,585,616	6,374,875	6,412,204	6,548,088	6,284,796	6,243,128	6,200,183	26,101,557	25,276,195	25,384,758
Income before income taxes	119,067	106,717	147,709	53,327	49,371	72,936	35,037	92,874	426,820	250,218	7,505
Income tax expense (benefit)	(1,715,965)	1,871	19,860	11,881	(6,006)	1,388	2,210	3,212	(1,682,353)	804	(110,600)
Net income	1,835,032	104,846	127,849	41,446	55,377	71,548	32,827	89,662	2,109,173	249,414	118,105
Basic (loss) income per share (in dollars per share)	$ 1.88	$ 0.11	$ 0.13	$ 0.04	$ 0.06	$ 0.05	$ 0.03	$ 0.10	$ 2.17	$ 0.23	$ 0.12
Diluted (loss) income per share (in dollars per share)	$ 1.79	$ 0.10	$ 0.13	$ 0.04	$ 0.06	$ 0.04	$ 0.03	$ 0.09	$ 2.08	$ 0.23	$ 0.12
Facilities impairment charges	13,105				7,877
LIFO (credit) charge	(23,489)				44,142				(18,857)	104,142	(147,882)
10.25% senior secured notes (second lien) due October 2019
Loss on debt retirements, net												$ 18,512
Debt instrument, stated interest rate (as a percent)		10.25%			10.25%					10.25%		10.25%	10.25%	10.25%