Segment Reporting - Adjusted EBITDA (Details) - USD ($) $ 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
Segment Reporting
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
Interest expense	103,678	106,879	115,410	123,607	98,442	97,400	100,950	100,820	449,574	397,612	424,591
Income tax expense									139,297	158,951	161,883
Income tax valuation allowance reduction									(26,358)	(1,841,304)	(161,079)
Depreciation and amortization expense									509,212	416,628	403,741
LIFO charge (credit)	6,796				(23,489)				11,163	(18,857)	104,142
Lease termination and impairment charges	$ 26,753	$ 7,011	9,637	$ 5,022	$ 21,284	8,702	$ 7,111	$ 4,848	48,423	41,945	41,304
Loss on debt retirement, net			$ 33,205			$ 18,512			33,205	18,512	62,443
Other									72,281	40,183	38,520
Adjusted EBITDA									$ 1,402,262	$ 1,322,843	$ 1,324,959