Other Intangible Assets Schedule of Finite-lived Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Finite Lived Intangible Assets [Line Items]
Amortization Expense 2013	$ 10.9
Amortization Expense 2014	10.9
Amortization Expense 2015	10.9
Amortization Expense 2016	10.9
Amortization Expense 2017	10.9
Weighted average life of intangible assets subject to amortization (in years)	19 years	18 years 10 months 6 days
Finite-Lived Intangible Assets, Gross	216.0	220.8
Finite-Lived Intangible Assets, Accumulated Amortization	(62.7)	(52.8)
Finite-Lived Intangible Assets, Net	153.3	168.0
Franchising rights
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	200.0	200.4
Finite-Lived Intangible Assets, Accumulated Amortization	(51.0)	(41.1)
Finite-Lived Intangible Assets, Net	149.0	159.3
Recipes and Menus
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	15.7	15.7
Finite-Lived Intangible Assets, Accumulated Amortization	(11.4)	(9.1)
Finite-Lived Intangible Assets, Net	4.3	6.6
Leaseholds/other
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	0.3	4.7
Finite-Lived Intangible Assets, Accumulated Amortization	(0.3)	(2.6)
Finite-Lived Intangible Assets, Net	$ 0	$ 2.1