Asset Sale to WBA - Operating results of discontinued operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 02, 2018	Jun. 03, 2017
Income statement disclosures
Revenues	$ 23,400	$ 2,377,857
Costs and expenses:
Cost of revenues	17,081	1,780,765
Selling, general and administrative expenses	13,875	600,640
Lease termination and impairment charges		48
Loss on debt retirements, net	4,570
Interest expense	4,615	58,937
Gain on stores sold to Walgreens Boots Alliance	(360,557)
(Gain) loss on sale of assets, net		(156)
Cost and expenses	(320,416)	2,440,234
Income (loss) from discontinued operations before income taxes	343,816	(62,377)
Income tax expense (benefit)	87,673	(23,065)
Net income (loss) from discontinued operations, net of tax	$ 256,143	$ (39,312)