OTHER GAINS AND CHARGES (Additional Information) (Details) $ in Millions	3 Months Ended	6 Months Ended
Dec. 25, 2019 USD ($) Restaurant	Dec. 26, 2018 USD ($)	Dec. 25, 2019 USD ($) Restaurant	Dec. 26, 2018 USD ($) Restaurant	Sep. 25, 2019 Restaurant
Restructuring Cost and Reserve [Line Items]
Number of restaurants \| Restaurant	1,675		1,675
Sale leaseback transaction, current period (gain) recognized		$ (4.6)		$ (24.7)
Sale leaseback transaction charges		0.2		7.0
(Gain) on sale of assets, net	$ (0.1)	(0.8)	$ (0.1)	(0.8)
Foreign currency transaction (gain) loss	(0.3)	0.7	(0.1)	(0.1)
Corporate headquarters relocation charges	0.3	0.5	0.7	1.0
Property damages, net of (insurance recoveries)	0.0	0.2	0.3	(0.6)
Cyber security incident charges	$ 0.0	$ 0.0	$ 0.0	$ 0.4
Chili's restaurant acquisition [Member]
Restructuring Cost and Reserve [Line Items]
Number of restaurants \| Restaurant					116
Chili's Restaurants [Member]
Restructuring Cost and Reserve [Line Items]
Number of underperforming restaurants \| Restaurant			10	2

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