Debt (Schedule of Borrowings) (Details) - USD ($) $ in Millions	Jun. 20, 2015	Jan. 03, 2015	Jun. 14, 2014
Debt Instrument [Line Items]
Long-term debt	$ 832.5	$ 900.2	$ 1,130.6
Capital lease obligations	0.6	0.6	0.7
Total debt	833.1	900.8	1,131.3
Term Loan A [Member] | October Tenth Two Thousand Eighteen [Member]
Debt Instrument [Line Items]
Long-term debt	457.5	525.2	755.6
Public Bonds [Member] | October Fifteen Two Thousand Twenty [Member]
Debt Instrument [Line Items]
Long-term debt	$ 375.0	$ 375.0	$ 375.0