Quarterly report pursuant to Section 13 or 15(d)

FUEL DERIVATIVE CONTRACTS (Details)

v2.4.0.6
FUEL DERIVATIVE CONTRACTS (Details) (USD $)
In Millions, unless otherwise specified
Apr. 28, 2012
gal
Apr. 30, 2011
gal
Derivative [Line Items]    
Gallons of Diesel Fuel in the Fuel Derivatives Contract for estimated fuel needs February through April 2012 (in gallons) 1,400,000.0  
Fuel needs percentage from February through April 2012 hedged by fuel derivative contracts (in hundredths) 41.00%  
Gallons of Diesel Fuel in the Fuel derivatives contracts for estimated fuel needs February 2011 through April 2011 (in gallons)   600,000.0
Fuel needs percentage from February 2011 through April 2011 hedged by fuel derivative contracts (in hundredths)   23.00%
Gallons of Diesel Fuel in the Fuel derivatives contract for estimated fuel needs May 2012 through July 2012 (in gallons) 1,400,000.0  
Fuel needs percentage from May 2012 through July 2012 hedged by fuel derivative contracts (in hundredths) 41.00%  
Gallons of Diesel Fuel in the Fuel derivatives contracts for estimated fuel needs August 2012 through October 2012 (in gallons) 600,000.0  
Fuel needs percentage from August 2012 through October 2012 hedged by fuel derivative contracts (in hundredths) 16.00%  
Derivative fair value $ 0.9