Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014
Accumulated depreciation and amortization	$ 425.6	$ 417.5
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	125,000,000us-gaap_CommonStockSharesAuthorized	125,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares outstanding	35,331,555us-gaap_CommonStockSharesOutstanding	36,655,584us-gaap_CommonStockSharesOutstanding
Common Stock, Shares, Issued	37,697,865us-gaap_CommonStockSharesIssued	37,697,865us-gaap_CommonStockSharesIssued

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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