Goodwill and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 02, 2018	Mar. 03, 2018
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	$ 1,899,075	$ 1,892,551
Accumulated Amortization	(1,363,655)	(1,335,608)
Net	535,420	556,943
Gross Carrying Amount of Indefinite Lived	33,500
Gross Carrying Amount, Total	1,932,575	1,926,051
Net, Total	568,920	590,443
Trademarks
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Indefinite Lived	33,500	33,500
Favorable leases and other
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	379,809	379,355
Accumulated Amortization	(318,930)	(316,798)
Net	$ 60,879	$ 62,557
Remaining Weighted Average Amortization Period	7 years	7 years
Prescription files
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	$ 906,181	$ 900,111
Accumulated Amortization	(808,498)	(801,706)
Net	$ 97,683	$ 98,405
Remaining Weighted Average Amortization Period	3 years	3 years
Customer relationships
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	$ 465,000	$ 465,000
Accumulated Amortization	(187,616)	(172,635)
Net	$ 277,384	$ 292,365
Remaining Weighted Average Amortization Period	14 years	15 years
CMS license
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	$ 57,500	$ 57,500
Accumulated Amortization	(6,747)	(6,172)
Net	$ 50,753	$ 51,328
Remaining Weighted Average Amortization Period	22 years	23 years
Claims adjudication and other developed software
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	$ 58,985	$ 58,985
Accumulated Amortization	(24,724)	(22,617)
Net	$ 34,261	$ 36,368
Remaining Weighted Average Amortization Period	4 years	5 years
Trademarks
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	$ 20,100	$ 20,100
Accumulated Amortization	(5,896)	(5,394)
Net	$ 14,204	$ 14,706
Remaining Weighted Average Amortization Period	7 years	8 years
Backlog
Finite Lived And Indefinite Lived Intangible Assets By Major Class
Gross Carrying Amount of Finite Lived	$ 11,500	$ 11,500
Accumulated Amortization	(11,244)	(10,286)
Net	$ 256	$ 1,214
Remaining Weighted Average Amortization Period	1 year	1 year