Income Taxes - Unrecognized Tax Benefits (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the beginning of period	$ 13.4	$ 10.1	$ 12.4
Increases related to prior periods (acquired entities)	3.3	3.7	0.5
Increases related to current year tax positions	1.7	0	0.2
Expiration of applicable statutes of limitations	(2.6)	(0.1)	(0.6)
Settlements with taxing authorities	0	(0.3)	(2.4)
Balance at the end of period	$ 15.8	$ 13.4	$ 10.1