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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Jun. 26, 2021	Dec. 26, 2020	Jun. 27, 2020
Statement of Financial Position [Abstract]
Preferred Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00	$ 1.00
Preferred Stock, Shares Authorized	40,000	40,000	40,000
Preferred Stock, Shares Issued	0	0	0
Common Stock, Par or Stated Value Per Share	$ 0.008	$ 0.008	$ 0.008
Common Stock, Shares Authorized	400,000,000	400,000,000	400,000,000
Common Stock, Shares, Issued	176,223,000	175,128,000	174,476,000
Common Stock, Shares, Outstanding	114,623,000	116,246,000	116,180,000
Treasury Stock, Shares	61,600,000	58,882,000	58,296,000

X

- Definition

Face amount or stated value per share of common stock.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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X

- Definition

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

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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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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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-Publisher FASB
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-Topic 505
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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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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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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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