Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2014	Jun. 01, 2013	Apr. 10, 2014	Mar. 01, 2014	May 31, 2014 Favorable leases and other	Mar. 01, 2014 Favorable leases and other	May 31, 2014 Prescription files	Mar. 01, 2014 Prescription files
Goodwill and Other Intangible Assets
Goodwill impairment charges	$ 0
Changes in the carrying amount of goodwill
Balance at beginning of period			83,971
Acquisitions	83,971
Balance at end of period	83,971		83,971
Finite-lived intangible assets
Gross Carrying Amount	2,008,034			1,987,377	641,236	634,320	1,366,798	1,353,057
Accumulated Amortization	(1,587,527)			(1,556,150)	(458,877)	(447,608)	(1,128,650)	(1,108,542)
Remaining Weighted Average Amortization Period					9 years	9 years	3 years	4 years
Unfavorable lease intangibles	60,920			62,687
Amortization expense for intangible assets and liabilities	29,237	31,685
Anticipated annual amortization expense for intangible assets and liabilities
2015	108,903
2016	97,359
2017	83,950
2018	46,031
2019	$ 20,101