Summary of Significant Accounting Policies (Details 2)	12 Months Ended
	Mar. 03, 2012 W	Feb. 26, 2011 W	Feb. 27, 2010 W
Fiscal Year
Number of weeks in a fiscal year	53	52	52
Prescription drugs
Product Class
Percentage of sales	68.10%	67.80%	67.90%
Over-the-counter medications and personal care
Product Class
Percentage of sales	9.80%
Health and beauty aids
Product Class
Percentage of sales	5.20%
General merchandise and other
Product Class
Percentage of sales	16.90%