Summary of Significant Accounting Policies (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 01, 2014 point	Mar. 02, 2013	Mar. 03, 2012
Intangible Assets
Estimated useful life of prescription files acquired in business combinations	10 years
Estimated useful life of purchased prescription files acquired in other than business combinations	5 years
Deferred Financing Costs
Amortization expenses of deferred financing costs	$ 15,259	$ 21,896	$ 22,049
Revenue Recognition
Number of points awarded for each dollar spent towards front end merchandise	1
Number of points awarded for each qualifying prescription	25
Accumulated number of points in a calendar year to achieve the "Gold" tier	1,000
Percentage discount on qualifying purchases of front end merchandise on achieving "Gold" tier	20.00%
Deferred revenue	103,562	100,883
Deferred revenue included in other current liabilities	83,668	78,696
Deferred revenue included in noncurrent liabilities	19,894	22,187
Advertising
Advertising expenses, net of vendor advertising allowances	322,843	335,779	369,405
Minimum
Insurance
Workers compensation occurrences	1,000
General liability occurrences	2,000
Buildings | Minimum
Property, Plant and Equipment
Useful life	30 years
Buildings | Maximum
Property, Plant and Equipment
Useful life	45 years
Equipment | Minimum
Property, Plant and Equipment
Useful life	3 years
Equipment | Maximum
Property, Plant and Equipment
Useful life	15 years
Internal-use software
Property, Plant and Equipment
Capitalized costs	$ 6,547	$ 5,844	$ 6,371