System Optimization (Gains) Losses, Net Summary of Disposition Activity (Details) $ in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Jul. 02, 2017 USD ($)	Dec. 30, 2018 USD ($) number_of_restaurants	Dec. 31, 2017 USD ($) number_of_restaurants	Dec. 31, 2017 CAD ($) number_of_restaurants	Jan. 01, 2017 USD ($) number_of_restaurants	Dec. 28, 2014 number_of_restaurants
Property, Plant and Equipment
Company-operated restaurant ownership percentage					5.00%
System optimization losses (gains), net
Proceeds from sales		$ 3,223	$ 81,516		$ 262,173
System optimization gains (losses), net	$ (41,050)	$ 463	$ (39,076)		$ 71,931
Sale of Company-Owned Restaurants to Franchisees
System optimization losses (gains), net
Number of restaurants sold to franchisees | number_of_restaurants		3	0	0	310
Proceeds from sales		$ 1,436	$ 0		$ 251,446
Net assets sold		(1,370)	0		(115,052)
Goodwill related to sales of restaurants		208	0		41,561
Net unfavorable leases		(220)	0		24,592
Other		(11)	0		3,103
Gain on sales of restaurants, net, before post-closing adjustments		89	0		67,138
Post-closing adjustments on sales of restaurants		445	2,541		(1,411)
System optimization gains (losses), net		534	2,541		65,727
Goodwill, Transfers					11,429
Favorable Lease Assets					7,612
Unfavorable Lease Liabilities					$ 32,204
Cash Proceeds from Post Closing Adjustments, Net of Payments		6	294
Recognition of deferred gain on sale of property		$ 1,029	$ 312
Sale of franchise-operated restaurant to franchisee
System optimization losses (gains), net
Number of restaurants sold to franchisees | number_of_restaurants		96	400	400	144
Sale of Other Assets
System optimization losses (gains), net
Proceeds from sales		$ 1,781	$ 10,534		$ 10,727
System optimization gains (losses), net		$ (71)	2,018		$ 6,204
Recognition of deferred gain on sale of property			375
Guarantee Obligations | Sale of Company-Owned Restaurants to Franchisees
System optimization losses (gains), net
Recognition of deferred gain on sale of property			$ 1,822
Franchises Sold, Deferred Gain on Sale | number_of_restaurants						8
Canada, Dollars | Guarantee Obligations | Sale of Company-Owned Restaurants to Franchisees
System optimization losses (gains), net
Recognition of deferred gain on sale of property				$ 2,300