Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended		6 Months Ended				6 Months Ended
	Jun. 27, 2013 property	Jun. 28, 2012	Dec. 27, 2012	Jun. 27, 2013 RCI	Jun. 28, 2012 RCI	Jun. 27, 2013 RCI	Jun. 28, 2012 RCI	Jun. 27, 2013 Prop I theatre	Dec. 27, 2012 Prop I	Jun. 27, 2013 NCM Inc. RCI	Jun. 28, 2012 NCM Inc. RCI	Jun. 27, 2013 DCIP RCI renewal_option screen	Jun. 28, 2012 DCIP RCI
Related Party Transactions
Management fee expenses				$ 1.6	$ 1.6	$ 2.9	$ 3.1
Related party receivables	93.3		95.6					9.8	9.8
Receivables related to intercompany transactions and cash management	83.5		85.8
Number of theatres subject to lease	3							3
Original base term of lease								15 years
Renewal extension period of the lease								10 years
Decrease in related party receivables due to the timing of intercompany cash collections and disbursements								(2.3)
Maximum term of lease, excluding renewal options												12 years
Number of one-year fair value renewal options												10
Fair value renewal options term												1 year
Annual minimum rent per digital projection system, from effective date of agreement through the end of the lease term												1,000
Incremental annual minimum rent per digital projection system beginning six and half years from agreement effective date, upon certain conditions												2,000
Annual minimum rent, initial period												6 years 6 months
Leased digital projection systems, total rent												0.5	0.4
Number of screens operated, outfitted with digital projection systems												464
Extended term of exhibitor services agreement										30 years
Right of first refusal period										5 years
Period prior to end of agreement term for commencement of right of first refusal										1 year
Other operating revenues, other revenue from National CineMedia
Theatre access fees per patron	0.3	0.3								0.5	0.6
Theatre access fees per digital screen	0.1	0.1								0.2	0.2
Other NCM revenue	0.1	0.1								0.2	0.2
Amortization of ESA modification fees	0.1	0.1								0.2	0.2
Payments for beverage concessionaire advertising	(0.3)	(0.2)								(0.5)	(0.5)
Total	$ 0.3	$ 0.4								$ 0.6	$ 0.7