OTHER GAINS AND CHARGES (Schedule of Other Gains and Charges) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 27, 2023	Dec. 28, 2022	Dec. 27, 2023	Dec. 28, 2022
Restructuring Cost and Reserve [Line Items]
Enterprise system implementation costs	$ 2.1	$ 1.0	$ 4.1	$ 2.0
Litigation & claims, net	1.0	0.3	3.2	0.8
Restaurant closure asset write-offs and charges	0.2	3.3	0.8	4.8
Lease contingencies	0.0	0.0	0.5	0.0
Remodel-related asset write-offs	0.1	0.2	0.3	1.0
Loss from natural disasters, net of (insurance recoveries)	(0.6)	1.1	(0.4)	0.9
Gain on the disposition of restaurants	(0.4)	0.0	(0.4)	0.0
Other	0.9	2.6	1.5	4.0
Other (gains) and charges	$ 3.3	$ 8.5	$ 9.6	$ 13.5