Goodwill and Intangible Assets Amortization Expense (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Estimated amortization expense of finite-lived intangible assets
2013	$ 47.9
2014	39.8
2015	37.1
2016	37.1
2017	23.0
Amortization expense of intangible assets	$ 42.4	$ 40.1	$ 42.7