Goodwill and Other Intangibles - Intangibles (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Feb. 25, 2022	May 30, 2020	Mar. 04, 2023	Feb. 26, 2022	Feb. 27, 2021
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount, Finite			$ 1,736,069	$ 1,732,305
Total Accumulated Amortization, Finite			(1,500,357)	(1,455,509)
Total Net, finite			235,712	276,796
Gross Carrying Amount, Total			1,750,469	1,746,705
Net, Total			250,112	291,196
Impairment of intangible assets		$ 29,852
Trademarks
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Total Accumulated Amortization, Finite
Gross Carrying Amount, Indefinite Lived			14,400	14,400
Impairment of intangible assets					$ 29,852
Noncompete agreements and other
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount, Finite			201,919	197,651
Total Accumulated Amortization, Finite			(182,957)	(178,958)
Total Net, finite			$ 18,962	$ 18,693
Remaining Weighted Average Amortization Period			3 years	3 years
Prescription files
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount, Finite			$ 1,029,665	$ 1,030,169
Total Accumulated Amortization, Finite			(928,478)	(918,773)
Total Net, finite			$ 101,187	$ 111,396
Remaining Weighted Average Amortization Period			5 years	6 years
Amortization period of intangible assets			5 years
Customer relationships
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount, Finite			$ 388,000	$ 388,000
Total Accumulated Amortization, Finite			(306,139)	(286,090)
Total Net, finite			$ 81,861	$ 101,910
Remaining Weighted Average Amortization Period			9 years	10 years
CMS license
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount, Finite			$ 57,500	$ 57,500
Total Accumulated Amortization, Finite			(23,798)	(15,372)
Total Net, finite			$ 33,702	$ 42,128
Remaining Weighted Average Amortization Period			4 years	5 years
Claims adjudication and other developed software
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount, Finite			$ 58,985	$ 58,985
Total Accumulated Amortization, Finite			(58,985)	(56,316)
Total Net, finite				$ 2,669
Remaining Weighted Average Amortization Period			0 years	1 year
EI (Elixir Insurance) | CMS license
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Remaining Weighted Average Amortization Period	19 years			5 years