Segment Reporting - Adjusted EBITDA (Details) - USD ($) $ 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
Segment Reporting
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
Interest expense	115,181	106,309	105,388	105,113	103,678	106,879	115,410	123,607	431,991	449,574	397,612
Income tax expense									29,689	139,297	158,951
Income tax valuation allowance increase/ (release)									14,703	(26,358)	(1,841,304)
Depreciation and amortization expense									568,231	509,212	416,628
LIFO (credit) charge	(47,881)				(6,796)				(6,620)	11,163	(18,857)
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
Loss on debt retirements, net							$ 33,205			33,205	18,512
Other									39,800	72,281	40,183
Adjusted EBITDA									$ 1,137,141	$ 1,402,262	$ 1,322,843