Income Taxes - Deferred Tax Balance Classified in Consolidated Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013
Income Taxes [Line Items]
Current assets, deferred tax	$ 34.4us-gaap_DeferredTaxAssetsNetCurrent	$ 35.5us-gaap_DeferredTaxAssetsNetCurrent
Noncurrent deferred tax asset	146.3us-gaap_DeferredTaxAssetsNetNoncurrent	121.7us-gaap_DeferredTaxAssetsNetNoncurrent
Deferred tax assets, net	156.6us-gaap_DeferredTaxAssetsLiabilitiesNet	138.6us-gaap_DeferredTaxAssetsLiabilitiesNet
Income and other taxes
Income Taxes [Line Items]
Current liabilities, income and other taxes	(0.4)	(0.4)
Other long-term liabilities
Income Taxes [Line Items]
Noncurrent liabilities, other long-term liabilities	$ (23.7)	$ (18.2)

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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-Publisher FASB

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards expected to be realized or consumed within one year or operating cycle, if longer.

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Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Amount of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed within one year or operating cycle, if longer.

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Gross amount of noncurrent deferred tax liabilities, which result from applying the applicable tax rate to taxable temporary differences pertaining to each jurisdiction to which the entity is obligated to pay income tax.

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