Facility Exit and Impairment Charges - Closed Store Liability rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 04, 2023	Feb. 26, 2022	Feb. 27, 2021
Lease termination and impairment charges
Facility exit charges	$ 74,310	$ 29,402	$ 12,116
Closed store liability
Provision for present value of executory costs for leases exited	108,626	35,121	84,552
Revenues and operating losses of closed stores or stores approved for closure
Income (loss) before income taxes	(756,403)	(542,258)	(120,227)
Depreciation and amortization	276,583	295,686	327,124
Retail Sites In Closed Or Approved For Closure Status [Member]
Revenues and operating losses of closed stores or stores approved for closure
Revenues	178,030	586,056	639,471
Operating expenses	192,357	640,996	699,662
Gain from sale of assets	(46,125)	(13,670)	(7,954)
Other expenses	25,396	52,999	13,057
Income (loss) before income taxes	6,402	(94,269)	(65,294)
Depreciation and amortization	934	3,499	4,535
Inventory liquidation charges	(6,369)	(1,646)	(1,528)
Facility exit charges
Closed store liability
Balance-beginning of period	18,688	3,443	2,253
Changes in assumptions and other adjustments	325	4,296	(73)
Interest accretion	863	72	27
Cash payments	(13,553)	(6,118)	(407)
Provision for present value of executory costs for leases exited	43,449	16,995	1,643
Balance-end of period	$ 49,772	$ 18,688	$ 3,443