Related Party Transactions - Franchisees (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2017	Sep. 24, 2017	Jun. 25, 2017	Mar. 26, 2017	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016	Jan. 02, 2018
Related party transactions
Revenues	$ 373,981	$ 364,007	$ 407,959	$ 427,369	$ 467,606	$ 431,709	$ 434,778	$ 449,266	$ 1,573,316	$ 1,783,359	$ 1,713,620
Accounts receivable - affiliates	69				86				69	86		$ 86
North America commissary
Related party transactions
Revenues									609,866	673,712	623,883
All others
Related party transactions
Revenues									60,509
North America franchising
Related party transactions
Revenues									79,293	106,729	102,980
Franchisees owned by related parties
Related party transactions
Revenues									3,320	3,394	3,033
Accounts receivable - affiliates	$ 69				$ 86				69	86
Franchisees owned by related parties | North America commissary
Related party transactions
Revenues									2,653	2,619	2,372
Franchisees owned by related parties | All others
Related party transactions
Revenues									238	336	248
Franchisees owned by related parties | North America franchising
Related party transactions
Revenues									$ 429	$ 439	$ 413