Interim Financial Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 04, 2017	Nov. 26, 2016	Aug. 27, 2016	May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May 30, 2015	Mar. 04, 2017	Feb. 27, 2016	Feb. 28, 2015	Aug. 15, 2015
Revenues	$ 8,541,360	$ 8,089,726	$ 8,029,806	$ 8,184,181	$ 8,270,136	$ 8,154,184	$ 7,664,776	$ 6,647,561	$ 32,845,073	$ 30,736,657	$ 26,528,377
Cost of revenues	6,473,198	6,194,866	6,113,063	6,289,881	6,228,581	6,151,305	5,742,485	4,788,031	25,071,008	22,910,402	18,951,645
Selling, general and administrative expenses	1,897,003	1,773,862	1,778,247	1,793,247	1,810,288	1,777,647	1,725,826	1,699,585	7,242,359	7,013,346	6,695,642
Lease termination and impairment charges	35,015	7,265	7,233	5,781	26,753	7,011	9,637	5,022	55,294	48,423	41,945
Interest expense	115,181	106,309	105,388	105,113	103,678	106,879	115,410	123,607	431,991	449,574	397,612
Loss on debt retirements, net							33,205			33,205	18,512
Loss (gain) on sale of assets, net	(5,755)	501	174	1,056	(348)	3,331	281	39	(4,024)	3,303	(3,799)
Total costs and expenses	8,514,642	8,082,803	8,004,105	8,195,078	8,168,952	8,046,173	7,626,844	6,616,284	32,796,628	30,458,253	26,101,557
Income (loss) before income taxes	26,718	6,923	25,701	(10,897)	101,184	108,011	37,932	31,277	48,445	278,404	426,820
Income tax (benefit) expense	47,860	(8,087)	10,928	(6,309)	35,567	48,468	16,463	12,441	44,392	112,939	(1,682,353)
Net income	$ (21,142)	$ 15,010	$ 14,773	$ (4,588)	$ 65,617	$ 59,543	$ 21,469	$ 18,836	$ 4,053	$ 165,465	$ 2,109,173
Basic and diluted (loss) income per share	$ (0.02)	$ 0.01	$ 0.01
Basic (loss) income per share (in dollars per share)					$ 0.06	$ 0.06	$ 0.02	$ 0.02	$ 0.00	$ 0.16	$ 2.17
Diluted (loss) income per share (in dollars per share)					$ 0.06	$ 0.06	$ 0.02	$ 0.02	$ 0.00	$ 0.16	$ 2.08
Facilities impairment charges	$ 30,493				$ 16,401
LIFO (credit) charge	$ (47,881)				$ (6,796)				$ (6,620)	$ 11,163	$ (18,857)
8.00% senior secured notes (senior lien) due August 2020
Loss on debt retirements, net							$ 33,205
Debt instrument, stated interest rate (as a percent)							8.00%					8.00%