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Stock-Based Compensation And Other Stock Plans (Dealer Stock Purchase Plan) (Narrative) (Detail) (Franchisee Stock Purchase Plan [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Franchisee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock	48,819	78,154	109,052
Shares reserved for issuance	410,245
Employee contributions for purchase of common stock	$ 2.2
Compensation expense	$ 0.7	$ 0.7	$ 1.6

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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