Revenue Recognition - Pro Forma Adjustments to Condensed Consolidated Statement of Income (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended				6 Months Ended
		Dec. 26, 2018	Sep. 26, 2018	Dec. 27, 2017	Sep. 27, 2017	Dec. 26, 2018		Dec. 27, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		$ 790.7		$ 766.4		$ 1,544.5		$ 1,505.8
Company sales		761.5				1,489.8
Cost of sales		200.9		192.9		392.8		380.5
Restaurant labor		260.8		250.4		517.1		501.5
Restaurant expenses (Note 2)		205.7		188.6		404.7		376.7
Company restaurant expenses	[1]	667.4		631.9		1,314.6		1,258.7
Depreciation and amortization		36.1		37.7		73.1		76.2
General and administrative		35.4		33.1		69.2		65.4
Other (gains) and charges		2.2		9.3		(8.9)	[2]	22.5
Total operating costs and expenses		741.1		712.0		1,448.0		1,422.8
Operating income		49.6		54.4		96.5		83.0
Interest expense		15.4		14.3		31.0		28.2
Other (income), net		(0.8)		(1.0)		(1.6)		(1.5)
Income before provision for income taxes		35.0		41.1		67.1		56.3
Provision for income taxes		3.0		15.8		8.7		21.1
Net income		$ 32.0	$ 26.4	$ 25.3	$ 9.9	$ 58.4		$ 35.2
Basic net income per share		$ 0.84		$ 0.55		$ 1.49		$ 0.74
Diluted net income per share		$ 0.83		$ 0.54		$ 1.46		$ 0.74
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		$ (5.8)				$ (10.6)
Cost of sales		0.0				0.0
Restaurant labor		0.0				0.0
Restaurant expenses (Note 2)		(5.2)				(10.3)
Company restaurant expenses		(5.2)				(10.3)
Depreciation and amortization		0.0				0.0
General and administrative		0.0				0.0
Other (gains) and charges		0.0				0.0
Total operating costs and expenses		(5.2)				(10.3)
Operating income		(0.6)				(0.3)
Interest expense		0.0				0.0
Other (income), net		0.0				0.0
Income before provision for income taxes		(0.6)				(0.3)
Provision for income taxes		(0.1)				0.0
Net income		$ (0.5)				$ (0.3)
Basic net income per share		$ (0.01)				$ (0.01)
Diluted net income per share		$ (0.02)				$ 0.00
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		$ 784.9				$ 1,533.9
Cost of sales		200.9				392.8
Restaurant labor		260.8				517.1
Restaurant expenses (Note 2)		200.5				394.4
Company restaurant expenses		662.2				1,304.3
Depreciation and amortization		36.1				73.1
General and administrative		35.4				69.2
Other (gains) and charges		2.2				(8.9)
Total operating costs and expenses		735.9				1,437.7
Operating income		49.0				96.2
Interest expense		15.4				31.0
Other (income), net		(0.8)				(1.6)
Income before provision for income taxes		34.4				66.8
Provision for income taxes		2.9				8.7
Net income		$ 31.5				$ 58.1
Basic net income per share		$ 0.83				$ 1.48
Diluted net income per share		$ 0.81				$ 1.46
Company sales [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues				$ 742.7				$ 1,459.6
Company sales		$ 761.5		742.7		$ 1,489.8		1,459.6
Company sales [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		0.0				0.0
Company sales [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		761.5				1,489.8
Franchise and other revenues [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues				23.7				46.2
Company sales		29.2		$ 23.7		54.7		$ 46.2
Franchise and other revenues [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		(5.8)				(10.6)
Franchise and other revenues [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenues		$ 23.4				$ 44.1

[1] Company restaurant expenses include Cost of sales, Restaurant labor, and Restaurant expenses including advertising expenses. With the adoption of ASC 606, for the thirteen and twenty-six week periods ended December 26, 2018, advertising contributions received from Chili’s franchisees are recorded as Franchise fees and other revenues within Total revenues, which differs from the thirteen and twenty-six week periods ended December 27, 2017 that includes Chili’s franchise advertising contributions recorded on a net basis within Company restaurant expenses.

[2] During the twenty-six week period ended December 26, 2018 we completed sale leaseback transactions of 145 company-owned Chili’s restaurant properties. As part of this transaction, we sold the related restaurant fixed assets totaling $170.9 million, net of accumulated depreciation. Additionally, Chili’s recognized $17.7 million of gain on the sale, including a certain portion of the deferred gain, net of related transaction costs incurred in Other (gains) and charges in the Consolidated Statements of Comprehensive Income. Please see Note 3 - Sale Leaseback Transactions for further details.