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Bank Credit Facility (Details) - 2011 Credit Agreement [Member] - USD ($)
$ in Millions
1 Months Ended
May 30, 2015
Oct. 28, 2017
May 28, 2015
Line of Credit Facility [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 700.0
Debt Instrument, Term 5 years    
Line of Credit Facility, Swing Loan Sublimit $ 30.0    
Line of Credit Facility, Letter of Credit Sublimit $ 150.0    
Line of Credit Facility, Amount Outstanding   $ 371.9  
Line of Credit Facility, Letters of Credit Outstanding   8.4  
Line of Credit Facility, Remaining Borrowing Capacity   $ 319.7