Summary of Significant Accounting Policies (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 25, 2012	Dec. 27, 2011	Dec. 28, 2010
Property, Plant and Equipment [Line Items]
Assets Held-for-sale	$ 0.3	$ 0.3
Franchise agreements renewal term	20 years
Advertising expense	56.0	54.4	55.6
Pre-opening expenses	1.0	0.5	0.1
Senior notes	190.0
Number of common stock available for future grant	15,555
Revolving Credit Facility [Member]
Property, Plant and Equipment [Line Items]
Revolving facility	100.0
Secured Debt [Member]
Property, Plant and Equipment [Line Items]
Unamortized loan costs	20.0
Amortization	4.1
PHI [Member]
Property, Plant and Equipment [Line Items]
Franchise agreements initial term	30 years
Royalty expense	50.5	46.9	47.7
Royalty expense percent of total sales	4.80%	4.80%	4.90%
Old Senior Secured Credit Facilities and Old Senior Subordinated Notes [Member]
Property, Plant and Equipment [Line Items]
Unamortized loan costs	3.7
Old Revolving Facility [Member]
Property, Plant and Equipment [Line Items]
Amortization		2.5
Old Senior Subordinated Notes [Member]
Property, Plant and Equipment [Line Items]
Amortization			2.6
Secured Debt [Member]
Property, Plant and Equipment [Line Items]
Term loan	375.0	375.0
Senior Notes [Member]
Property, Plant and Equipment [Line Items]
Senior notes	$ 190.0
Stock Compensation Plan [Member]
Property, Plant and Equipment [Line Items]
Number of common stock available for future grant	261,469
Percentage of outstanding shares of common stock of the purchaser	10.00%
Expired date	10 years
Series One [Member] | Stock Compensation Plan [Member]
Property, Plant and Equipment [Line Items]
Percentage of options granted	80.00%
Series Two [Member] | Stock Compensation Plan [Member]
Property, Plant and Equipment [Line Items]
Percentage of options granted	20.00%