PRE-TAX INCOME AND INCOME TAXES - Reconciliation of Income Taxes to the Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	May 30, 2021	May 31, 2020	May 26, 2019
Income Tax Disclosure [Abstract]
Computed U.S. Federal income taxes	$ 313.9	$ 219.0	$ 188.8
State income taxes, net of U.S. Federal tax impact	37.4	29.6	34.1
Goodwill and intangible impairments	13.6	11.2	12.5
Remeasurement of deferred taxes due to legal entity reorganization	35.8	(40.9)	16.9
State tax impact of combining Pinnacle business	0.0	0.0	(12.0)
Change of valuation allowance on capital loss carryforward	(188.5)	0.0	(32.2)
Other	(18.4)	(17.6)	10.7
Total provision for income taxes	$ 193.8	$ 201.3	$ 218.8