Business and Summary of Significant Accounting Policies - Revenue Recognition and Franchise (Details) - restaurant	12 Months Ended
	Dec. 28, 2021	Dec. 29, 2020	Dec. 31, 2019
Franchisor Disclosure [Line Items]
Percent of gift cards expected to be unredeemed (percent)	9.00%
Gift card estimated redemption period	24 months
Number of restaurants closed	12	6	5
Franchise
Franchisor Disclosure [Line Items]
Number of restaurants	76	76	68
Number of restaurants opened during period	1	0	1
Number of restaurants closed	1	1	2
Number of company-owned restaurants acquired by franchisees		9	5