Summary of Significant Accounting Policies (Details 5)	12 Months Ended
	Mar. 02, 2013	Mar. 03, 2012	Feb. 26, 2011
Derivatives
Number of interest rate swap arrangements or other derivatives held	0	0
Pharmacy sales | Customers | Top five third party payors
Significant Concentrations
Percentage of concentration risk	71.70%
Pharmacy sales | Customers | Largest third party payor
Significant Concentrations
Percentage of concentration risk	35.30%	22.90%	23.80%
Pharmacy sales | Customers | Medicaid agencies and related managed care Medicaid payors
Significant Concentrations
Percentage of concentration risk	17.40%
Pharmacy sales | Customers | Largest Medicaid agency
Significant Concentrations
Percentage of concentration risk	1.10%
Pharmacy sales | Customers | Medicare Part D
Significant Concentrations
Percentage of concentration risk	30.00%
Purchases | Suppliers | McKesson Corp.
Significant Concentrations
Percentage of concentration risk	88.70%
Purchases | Suppliers | Manufactures
Significant Concentrations
Percentage of concentration risk	80.00%