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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
May 31, 2014
Jun. 01, 2013
Mar. 01, 2014
Fair Value Measurements      
Carrying value of long-lived assets $ 358 $ 17,508  
Fair value of long-lived assets 207 12,907  
Impairment charges 151 4,601  
Non-financial assets measured on a non-recurring basis      
Outstanding derivative financial instruments 0   0
Nonrecurring basis | Level 1
     
Non-financial assets measured on a non-recurring basis      
Carrying value of total long-term indebtedness 5,600,616    
Estimated fair value of total long-term indebtedness 6,066,108    
Nonrecurring basis | Level 2
     
Non-financial assets measured on a non-recurring basis      
Fair value of Long-lived assets held for sale   12,315  
Fair value of Total   12,315  
Nonrecurring basis | Level 3
     
Non-financial assets measured on a non-recurring basis      
Fair value of long-lived assets held for use 207 592  
Fair value of Total 207 592  
Nonrecurring basis | Total
     
Non-financial assets measured on a non-recurring basis      
Fair value of long-lived assets held for use 207 592  
Fair value of Long-lived assets held for sale   12,315  
Fair value of Total $ 207 $ 12,907