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Commitments And Contingencies (Details) (USD $)
12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Oct. 01, 2010
Commitments and Contingencies Disclosure [Abstract]      
Capital and other purchase commitments $ 254,600,000    
Letters of credit outstanding 181,700,000    
Maximum potential liability from vehicle leases 96,800,000    
Rental expense for all operating leases 177,400,000 168,100,000 172,400,000
2013 205,009,000    
2014 89,041,000    
2015 74,857,000    
2016 60,473,000    
2017 51,664,000    
Subsequent years 102,024,000    
Total minimum rental obligations $ 583,068,000    
Minimum
     
Lease Arrangements [Line Items]      
Operating Lease Terms 1 year    
Maximum
     
Lease Arrangements [Line Items]      
Operating Lease Terms 8 years