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Debt (Schedule of Borrowings) (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 30, 2017
Apr. 01, 2017
Debt Instrument [Line Items]      
Borrowings under revolving credit agreements and other short-term notes $ 0.8 $ 0.5 $ 2.4
Capital lease obligations 0.4 0.5 0.5
Unamortized debt issuance costs (5.8) (6.5) (7.9)
Total debt 672.3 782.6 813.1
Term Loan A [Member] | July Thirteenth Two Thousand Twenty [Member]      
Debt Instrument [Line Items]      
Long-term debt 426.9 538.1 568.1
Senior Notes [Member] | September First Two Thousand Twenty Six [Member]      
Debt Instrument [Line Items]      
Long-term debt $ 250.0 $ 250.0 $ 250.0