Income Taxes (Details) - USD ($)	2 Months Ended	3 Months Ended								10 Months Ended	12 Months Ended
	Mar. 03, 2018	Mar. 03, 2018	Dec. 02, 2017	Sep. 02, 2017	Jun. 03, 2017	Mar. 04, 2017	Nov. 26, 2016	Aug. 27, 2016	May 28, 2016	Dec. 31, 2017	Mar. 02, 2019	Mar. 03, 2018	Mar. 04, 2017	Feb. 27, 2016
Federal statutory rate (as a percent)	21.00%									35.00%		32.60%	35.00%	35.00%
Current tax:
Federal												$ (210,000)		$ (52,000)
State												51,279,000	$ 14,600,000	6,590,000
Total current tax expense (benefit)												51,069,000	14,600,000	6,538,000
Deferred tax and other:
Federal												316,451,000	10,355,000	83,074,000
State												(61,533,000)	19,483,000	(40,100,000)
Total deferred tax expense (benefit)												254,918,000	29,838,000	42,974,000
Total income tax expense (benefit)		$ 216,719,000	$ (16,061,000)	$ 117,450,000	$ (12,121,000)	$ 48,262,000	$ (4,682,000)	$ 3,879,000	$ (3,021,000)			305,987,000	44,438,000	49,512,000
Reconciliation of the expected statutory federal tax and the total income tax expense (benefit)
Federal statutory rate												(14,202,000)	16,982,000	53,060,000
Federal tax rate change		324,765,000										324,765,000
Nondeductible expenses												1,213,000	2,479,000	6,518,000
State income taxes, net												(22,836,000)	8,225,000	16,482,000
Increase/(decrease) of previously recorded liabilities												27,295,000	(955,000)
Nondeductible compensation												654,000	1,157,000	6,057,000
Acquisition costs												696,000	4,023,000	6,782,000
Stock based compensation												8,363,000
Valuation allowance												(8,853,000)	14,718,000	(38,058,000)
Other												(11,108,000)	(2,191,000)	(1,329,000)
Total income tax expense (benefit)		216,719,000	$ (16,061,000)	$ 117,450,000	(12,121,000)	48,262,000	$ (4,682,000)	$ 3,879,000	(3,021,000)			305,987,000	44,438,000	49,512,000
Income tax (benefit) expense												749,704,000	(46,000)	63,427,000
Deferred tax assets:
Accounts receivable	$ 39,182,000	39,182,000				68,320,000						39,182,000	68,320,000
Accrued expenses	113,493,000	113,493,000				194,884,000						113,493,000	194,884,000
Liability for lease exit costs	40,662,000	40,662,000				68,411,000						40,662,000	68,411,000
Pension, retirement and other benefits	104,494,000	104,494,000				168,274,000						104,494,000	168,274,000
Long-lived assets	246,793,000	246,793,000				509,283,000						246,793,000	509,283,000
Other						1,630,000							1,630,000
Credits	85,555,000	85,555,000				65,971,000						85,555,000	65,971,000
Net operating losses	1,089,084,000	1,089,084,000				1,207,650,000						1,089,084,000	1,207,650,000
Total gross deferred tax assets	1,719,263,000	1,719,263,000				2,284,423,000						1,719,263,000	2,284,423,000
Valuation allowance	(896,800,000)	(896,800,000)				(226,726,000)						(896,800,000)	(226,726,000)
Total deferred tax assets	822,463,000	822,463,000				2,057,697,000						822,463,000	2,057,697,000
Deferred tax liabilities:
Outside basis difference	5,420,000	5,420,000				112,509,000						5,420,000	112,509,000
Inventory	223,024,000	223,024,000				439,624,000						223,024,000	439,624,000
Total gross deferred tax liabilities	228,444,000	228,444,000				552,133,000						228,444,000	552,133,000
Net deferred tax assets	594,019,000	594,019,000				1,505,564,000						594,019,000	1,505,564,000
Reconciliation of beginning and ending amount of unrecognized tax benefits
Unrecognized tax benefits at beginning of the period					$ 8,939,000				$ 10,676,000	$ 8,939,000	$ 230,210,000	8,939,000	10,676,000	9,514,000
Increases to prior year tax positions													16,000	1,667,000
Decreases to tax positions in prior periods												(1,015,000)	(626,000)	(577,000)
Increases to current year tax positions												224,408,000	26,000	72,000
Divestitures												(1,607,000)
Lapse of statute of limitations												(515,000)	(1,153,000)
Unrecognized tax benefits balance at end of the period	230,210,000	230,210,000				8,939,000						230,210,000	8,939,000	10,676,000
Unrecognized tax benefits which would impact effective tax rate, if recognized	$ 31,377,000	$ 31,377,000				$ 892,000						31,377,000	892,000	2,084,000
Decrease in unrecognized tax benefits related to state exposures												13,498,000
Discontinued operations
Reconciliation of the expected statutory federal tax and the total income tax expense (benefit)
Valuation allowance												$ (32,870,000)	$ 15,000	$ 11,700,000
Forecast
Federal statutory rate (as a percent)											21.00%