Income Taxes (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 27, 2016 USD ($)	Nov. 28, 2015 USD ($)	Aug. 29, 2015 USD ($)	May. 30, 2015 USD ($)	Feb. 28, 2015 USD ($)	Nov. 29, 2014 USD ($)	Aug. 30, 2014 USD ($)	May. 31, 2014 USD ($)	Feb. 27, 2016 USD ($) item	Feb. 28, 2015 USD ($)	Mar. 01, 2014 USD ($)
Current tax:
Federal									$ (52)
State									9,396	$ 6,011	$ 4,748
Total current tax expense (benefit)									9,344	6,011	4,748
Deferred tax and other:
Federal									117,200	(1,544,344)
State									(13,605)	(144,020)	(30,609)
Tax expense recorded as an increase of additional paid-in capital											26,665
Total deferred tax expense (benefit)									103,595	(1,688,364)	(3,944)
Total income tax (benefit) expense	$ 35,567	$ 48,468	$ 16,463	$ 12,441	$ (1,715,965)	$ 1,871	$ 19,860	$ 11,881	$ 112,939	$ (1,682,353)	$ 804
Reconciliation of the expected statutory federal tax and the total income tax expense (benefit)
Federal statutory rate (as a percent)									35.00%	35.00%	35.00%
Nondeductible expenses									2.30%	0.20%	0.30%
State income taxes, net									8.60%	2.70%	17.70%
Decrease of previously recorded liabilities										(0.90%)	(8.40%)
Nondeductible compensation									2.20%	1.20%	17.70%
Acquisition Costs									2.40%
Release of indemnification asset											2.40%
Valuation allowance									(9.50%)	(431.40%)	(64.40%)
Other									(0.40%)	(1.00%)
Total income tax expense (benefit)									40.60%	(394.20%)	0.30%
Income tax valuation allowance reduction									$ (26,358)	$ (1,841,304)	$ (161,079)
Cumulative profitability period used to determine change in valuation allowance									3 years
Number of consecutive quarters' reported earnings used to determine change in valuation allowance | item									10
Number of years' utilization of federal and state NOL's used to determine change in valuation allowance									3 years
Deferred tax assets:
Accounts receivable	72,883				68,582				$ 72,883	68,582
Accrued expenses	198,636				207,553				198,636	207,553
Liability for lease exit costs	81,704				98,906				81,704	98,906
Pension, retirement and other benefits	182,394				175,081				182,394	175,081
Long-lived assets	487,944				475,187				487,944	475,187
Other	6,203				5,232				6,203	5,232
Credits	64,382				63,826				64,382	63,826
Net operating losses	1,182,440				1,300,964				1,182,440	1,300,964
Total gross deferred tax assets	2,276,586				2,395,331				2,276,586	2,395,331
Valuation allowance	(212,023)				(231,679)				(212,023)	(231,679)
Total deferred tax assets	2,064,563				2,163,652				2,064,563	2,163,652
Deferred tax liabilities:
Outside basis difference	108,860								108,860
Inventory	416,562				437,165				416,562	437,165
Total gross deferred tax liabilities	525,422				437,165				525,422	437,165
Net deferred tax assets	1,539,141				1,726,487				1,539,141	1,726,487
Reconciliation of beginning and ending amount of unrecognized tax benefits
Unrecognized tax benefits at beginning of the period				$ 9,514				$ 10,143	9,514	10,143	30,020
Increases to prior year tax positions									1,667	1,003
Decreases to tax positions in prior periods									(577)	(984)	(3,215)
Increases to current year tax positions									72	123
Settlements										(681)
Lapse of statute of limitations										(90)	(16,662)
Unrecognized tax benefits balance at end of the period	10,676				9,514				10,676	9,514	10,143
Unrecognized tax benefits which would impact effective tax rate, if recognized	$ 2,084				$ 440				$ 2,084	$ 440	$ 876