Description of Business and Summary of Significant Accounting Policies (Details 5) shares in Thousands, $ in Millions	12 Months Ended
Dec. 30, 2018 USD ($) fund shares	Dec. 31, 2017 USD ($) shares	Dec. 25, 2016 USD ($) shares
Advertising
Required percentage of revenues contributed to national media funds	3.00%
Number of marketing and national media funds to which the entity and franchisees must contribute a minimum percentage of revenue \| fund	2
Advertising and marketing costs \| $	$ 44.3	$ 48.0	$ 37.6
Earnings Per Share
Basic weighted average shares outstanding	12,976	12,899	13,332
Dilutive effect of stock options and awards (in shares)	0	99	130
Diluted weighted average shares outstanding	12,976	12,998	13,462
Awards excluded due to anti-dilutive effect on diluted earnings per share	427	329	229

Advertising Expense, Required Percent of Revenue Contribution

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Number Of Marketing And Advertising Funds

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The total expense recognized in the period for promotion, public relations, and brand or product advertising.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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