Basis Of Presentation Narrative (Details)	3 Months Ended			12 Months Ended
	Jun. 30, 2019 restaurant	Dec. 30, 2018 USD ($)	Apr. 01, 2018	Dec. 29, 2019 USD ($) restaurant shares	Dec. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 29, 2019	Mar. 31, 2019	Dec. 31, 2018 USD ($)	Sep. 30, 2018	Jul. 01, 2018
Entity Information [Line Items]
Pre-Opening Costs				$ 1,400,000	$ 600,000	$ 500,000
Cash and Cash Equivalents, at Carrying Value				$ 2,300,000
Restaurants Acquired	233	10	1	44
Number of Restaurants	1,081	849	807	1,101	849		1,088	845		838	807
Number of states				23
Weeks In fiscal period				52		52
Franchise Term Renewal Period				20 years
Franchise Agreement, Term				20 years
Long-term Debt, Fair Value		$ 277,100,000			$ 277,100,000
Asset Impairment Charges				$ 1,700,000	2,700,000	$ 1,700,000
Cash, FDIC Insured Amount				$ 250,000
Number of Reportable Segments				1
Deferred income-sale-leaseback of real estate		10,073,000		$ 0	10,073,000
Operating Lease, Liability				849,097,000
Operating right-of-use assets, net		$ 0		$ 811,016,000	$ 0
Minimum [Member]
Entity Information [Line Items]
Weeks In fiscal period				52
Maximum [Member]
Entity Information [Line Items]
Weeks In fiscal period				53
Burger King Corporate [Member]
Entity Information [Line Items]
Number of Restaurants				1,036
Popeyes Franchises [Member]
Entity Information [Line Items]
Number of Restaurants				65
Number of states				7
Right of First Refusal, Number of States | shares				2
Accounting Standards Update 2016-02 [Member]
Entity Information [Line Items]
Cumulative-effect adjustment from new accounting principal adoption									$ 7,504,000
Operating Lease, Liability									542,900,000
Operating right-of-use assets, net									517,600,000
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member]
Entity Information [Line Items]
Cumulative-effect adjustment from new accounting principal adoption									$ 7,504,000
Senior Secured Second Lien Notes due 2022 [Member]
Entity Information [Line Items]
Interest Rate				8.00%