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Long-Term Debt (Tables)
 3 Months Ended
Mar. 31, 2013
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block]
The following table presents the outstanding balance, total amount of letters of credit, and available borrowing capacity under the Company’s credit facility as of April 25, 2013, March 31, 2013, and December 31, 2012:
 
 
As of April 25, 2013
 
As of March 31, 2013
 
As of December 31, 2012
 
(in millions)
Credit facility balance
$
470.0

 
$
430.0

 
$
340.0

Letters of credit (1)
$
0.8

 
$
0.8

 
$
0.8

Available borrowing capacity
$
829.2

 
$
569.2

 
$
659.2

(1) Letters of credit reduce the amount available under the credit facility on a dollar-for-dollar basis.