INCOME TAXES (Deferred Income Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 24, 2020	Jun. 26, 2019	Jun. 27, 2018
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 0.0	$ 0.0	$ 8.2
Deferred income tax assets:
Lease liabilities	313.7	27.5
Gift cards	13.7	12.3
Insurance reserves	12.2	11.5
Stock-based compensation	11.0	9.9
Federal credit carryover	7.3	9.0
Net operating losses	3.2	3.7
State credit carryover	2.8	2.6
Restructure charges and impairments	1.4	3.0
Deferred gain on sale leaseback transactions	0.0	68.6
Other, net	10.3	11.2
Less: Valuation allowance	(5.6)	(5.5)
Total deferred income tax assets	370.0	153.8
Deferred income tax liabilities:
Lease assets	275.5	2.2
Goodwill and other amortization	21.6	20.6
Depreciation and capitalized interest on property and equipment	19.8	4.3
Prepaid expenses	14.4	13.6
Other, net	0.5	1.1
Total deferred income tax liabilities	331.8	41.8
Deferred income taxes, net	$ 38.2	$ 112.0