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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 30, 2014	Dec. 31, 2013
Common stock, par value (in dollars per share)	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare	$ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized	250,000,000us-gaap_CommonStockSharesAuthorized	250,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	91,790,499us-gaap_CommonStockSharesIssued	90,632,325us-gaap_CommonStockSharesIssued
Treasury stock, shares	41,919,312us-gaap_TreasuryStockShares	38,865,951us-gaap_TreasuryStockShares
Preferred stock
Preferred stock, par value (in dollars per share)	$ 0.01us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember	$ 0.01us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember	5,000,000us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember	0us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember

X

- Definition

Face amount or stated value per share of common stock.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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-Topic 210

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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