Debt (Schedule of Borrowings) (Details) (USD $) In Millions, unless otherwise specified	Sep. 06, 2014	Dec. 28, 2013	Sep. 07, 2013
Debt Instrument [Line Items]
Long-term debt	$ 1,095.9	$ 1,150.0	$ 1,142.1
Capital lease obligations	0.7	0	0
Total debt	1,096.6	1,150.0	1,142.1
Term Loan A [Member] | October Tenth Two Thousand Eighteen [Member]
Debt Instrument [Line Items]
Long-term debt	720.9	775.0	529.4
Term Loan B [Member] | October Ninth Two Thousand Nineteenth [Member]
Debt Instrument [Line Items]
Long-term debt	0	0	237.7
Public Bonds [Member] | October Fifteen Two Thousand Twenty [Member]
Debt Instrument [Line Items]
Long-term debt	$ 375.0	$ 375.0	$ 375.0