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Long-Term Debt and Capital Lease Obligations (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 3 Months Ended 9 Months Ended
Sep. 26, 2014
Sep. 26, 2014
Long-term Debt [Member]
Oct. 23, 2012
Long-term Debt [Member]
Credit Facility [Member]
Sep. 26, 2014
Long-term Debt [Member]
Credit Facility [Member]
Sep. 26, 2014
Revolving Credit Facility [Member]
Unsecured Debt [Member]
Oct. 23, 2012
Revolving Credit Facility [Member]
Unsecured Debt [Member]
Debt Instrument [Line Items]            
Line of Credit Facility, Interest Rate Description         LIBOR  
Debt Instrument, Basis Spread on Variable Rate         1.25%  
Line of Credit Facility, Maximum Borrowing Capacity   $ 519.9   $ 500.0   $ 500.0
Amount of committed working capital facilities applied to letter of credit facility 13.9          
Other letters of credit and bank guarantees $ 13.3          
Debt instrument, Term     5 years 5 years 0 months