Sale Leaseback Transactions - Additional Information (Details) $ in Millions		3 Months Ended				6 Months Ended
		Dec. 26, 2018 USD ($) Location	Sep. 26, 2018 USD ($) Location	Mar. 28, 2018 USD ($)	Dec. 27, 2017 USD ($)	Dec. 26, 2018 USD ($) Location	Dec. 27, 2017 USD ($)	Jun. 27, 2018 USD ($)
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Gross Proceeds		$ 10.6	$ 455.7
Straight-line rent	[1]	56.6				$ 56.6		$ 55.6
Sale leaseback gain, net of transaction charges		4.4			$ 0.0	17.7	$ 0.0
Accelerated depreciation		$ 0.5	$ 0.5		$ 0.5	$ 1.0	$ 1.0
Chili's Restaurants [Member]
Sale Leaseback Transaction [Line Items]
Number of restaurant properties included in sale-leaseback | Location		145	141			145
Sale Leaseback Transaction, Accumulated Depreciation		$ 5.7	$ 163.9			$ 5.7
Sale leaseback transaction, gross gain on sale		$ 6.3	289.1
Increase in Property Subject to or Available for Operating Lease, Number of Units | Location		4
Sale Leaseback Transaction, Lease Terms						The initial terms of all leases are for 15 years, plus renewal options at our discretion, which contain scheduled rent increases
Sale Leaseback Transaction, Description of Accounting for Leaseback						all of the leases were determined to be operating leases
Straight-line rent		$ 1.2				$ 1.2
Sale Leaseback Transaction, Deferred Gain, Net		270.6				270.6
CorporateHeadquarters [Member]
Sale Leaseback Transaction [Line Items]
Proceeds from Sale of Property, Plant, and Equipment				$ 13.7
Land [Member] | Chili's Restaurants [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Historical Cost		2.9	103.6			2.9
Land [Member] | CorporateHeadquarters [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Historical Cost		5.9				5.9
Buildings And Leasehold Improvements [Member] | Chili's Restaurants [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Historical Cost		6.8	217.6			6.8
Furniture And Equipment [Member] | Chili's Restaurants [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Historical Cost		0.3	$ 9.3			0.3
Building and Building Improvements [Member] | CorporateHeadquarters [Member]
Sale Leaseback Transaction [Line Items]
Sale Leaseback Transaction, Historical Cost		$ 2.0				$ 2.0

[1] Straight-line rent is the long-term portion of the straight-line rent, and for the second quarter of fiscal 2019 this balance also includes $1.2 million for the straight-line rent accrued for 145 restaurants sold as part of the sale leaseback transactions. Please see Note 3 - Sale Leaseback Transactions for more details, and the above Other accrued liabilities table for the current portion of straight-line rent recorded to be recognized within the next twelve months.