Income Taxes Deferred Tax Assets and Liabilities (Details) (USD $) In Millions, unless otherwise specified	Jan. 01, 2015	Dec. 26, 2013
Deferred tax assets:
Net operating loss carryforward	$ 7.7	$ 9.8
Excess of tax basis over book basis of fixed assets	10.8	13.6
Deferred revenue	9.3us-gaap_DeferredTaxAssetsDeferredIncome	9.5us-gaap_DeferredTaxAssetsDeferredIncome
Other	2.2us-gaap_DeferredTaxAssetsOther	1.4us-gaap_DeferredTaxAssetsOther
Total deferred tax assets before valuation allowance	30.0us-gaap_DeferredTaxAssetsGross	34.3us-gaap_DeferredTaxAssetsGross
Valuation allowance	(2.1)	(2.4)
Total deferred tax assets after valuation allowance	27.9us-gaap_DeferredTaxAssetsNet	31.9us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:
Deferred gain on sale of theatres	(19.2)	(22.7)
Excess of book basis over tax basis of intangible assets	(28.0)	(28.0)
Deferred rent	(3.0)	(2.3)
Other	(0.1)us-gaap_DeferredTaxLiabilitiesOther	(0.1)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	(50.3)us-gaap_DeferredIncomeTaxLiabilities	(53.1)us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax liability	$ (22.4)us-gaap_DeferredTaxLiabilities	$ (21.2)us-gaap_DeferredTaxLiabilities

Deferred Tax Liabilities, Gain on Sale of Theatres

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Amount of deferred tax liability attributable to taxable temporary differences.

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