Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 29, 2012
Income Tax Disclosure [Abstract]
Gross unrecognized tax benefit	$ 20.5		$ 20.5		$ 24.9
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations	3.8
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations, Not Impacting Tax Expense	1.9
Unrecognized tax benefits that would impact effective tax rate, if recognized	18.8		18.8
Accrued interest and penalties related to uncertain tax positions	4.8		4.8		5.9
Significant Change in Unrecognized Tax Benefits Reasonably Possible, Amount of Unrecorded Benefit	$ 1.1		$ 1.1
Effective tax rate	23.40%	29.40%	24.50%	30.00%