Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Aug. 30, 2014	Aug. 31, 2013	Aug. 30, 2014	Aug. 31, 2013	Mar. 01, 2014	Aug. 30, 2014 Favorable leases and other	Mar. 01, 2014 Favorable leases and other	Aug. 30, 2014 Prescription files	Mar. 01, 2014 Prescription files
Goodwill and Other Intangible Assets
Goodwill impairment charges			$ 0
Acquisitions:
Initial goodwill acquired			83,971
Change in purchase price allocation			(10,868)
Balance at end of period	73,103		73,103
Finite-lived intangible assets
Gross Carrying Amount	2,025,670		2,025,670		1,987,377	643,747	634,320	1,381,923	1,353,057
Accumulated Amortization	(1,614,375)		(1,614,375)		(1,556,150)	(466,290)	(447,608)	(1,148,085)	(1,108,542)
Remaining Weighted Average Amortization Period						9 years	9 years	3 years	4 years
Unfavorable lease intangibles	59,278		59,278		62,687
Amortization expense for intangible assets and liabilities	28,532	29,121	57,769	60,806
Anticipated annual amortization expense for intangible assets and liabilities
2015	111,742		111,742
2016	101,315		101,315
2017	88,024		88,024
2018	50,059		50,059
2019	$ 24,105		$ 24,105