Guarantees and Other Commitments and Contingencies Franchisee Image Activation Programs (Details) - Maximum	12 Months Ended
	Dec. 30, 2018
New Build Incentive Program
Other commitments
Years of reduction in royalty payment attributable to new builds	2 years
2018 New Build Incentive Program
Other commitments
Years of reduction in royalty payment attributable to new builds	2 years
Remodel Incentive Program
Other commitments
Years of reduction in royalty payment attributable to incentive program	1 year