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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Nov. 26, 2011
Nov. 27, 2010
Nov. 26, 2011
AuditCycle
Nov. 27, 2010
Feb. 26, 2011
Income Taxes          
Income tax expense $ 972 $ (1,613) $ 533 $ 8,354  
Recognition of unrecognized tax benefits 1,747   8,040    
Recoverable indemnification asset from Jean Coutu Group 164,675   164,675   158,209
Number of audit cycles for which revenue agent report has been received     3    
Valuation allowance against net deferred tax assets 2,272,489   2,272,489   2,199,302
Reasonably possible amount of decrease in unrecognized tax positions over the next 12 months          
Amount of decrease in unrecognized tax positions including interest and penalties 95,764   95,764    
Minimum
         
Reasonably possible amount of decrease in unrecognized tax positions over the next 12 months          
Period of state income tax returns subject to examination (in years)     3Y    
Maximum
         
Reasonably possible amount of decrease in unrecognized tax positions over the next 12 months          
Period of state income tax returns subject to examination (in years)     5Y    
Brooks Eckerd, Pending tax audit for pre-acquisition period
         
Reasonably possible amount of decrease in unrecognized tax positions over the next 12 months          
Amount of decrease in unrecognized tax positions including interest and penalties $ 61,129   $ 61,129