Goodwill and Other Intangible Assets - Intangibles (Details) - USD ($) $ in Thousands	Mar. 04, 2023	Feb. 26, 2022	Feb. 25, 2022
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
Trademarks
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Total Accumulated Amortization, Finite
Gross Carrying Amount, Indefinite Lived	14,400	14,400
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
Trademarks
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Amortization period of intangible assets	10 years
EI (Elixir Insurance) | CMS license
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Remaining Weighted Average Amortization Period		5 years	19 years