PRE-TAX INCOME AND INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 26, 2019	May 27, 2018
Tax Credit Carryforward [Line Items]
Income taxes paid, net of refunds	$ 178.0	$ 133.8	$ 164.1
Liabilities for gross unrecognized tax benefits	35.8	44.1
Related liability for gross interest and penalties	7.4	11.7
Tax positions for which deductibility is high but timing is uncertain	0.7
Interest and penalties recognized	(4.3)	1.2	1.6
Net amount of unrecognized tax benefits that, if recognized, would favorably impact effective tax rate	30.3	37.3
Estimated decrease in gross unrecognized tax benefits	16.0
Foreign net operating loss carryforwards	27.3
Foreign net operating loss carryforwards (expiring between fiscal 2021 and 2041)	13.3
Foreign net operating loss carryforwards with no expiration dates	14.0
Federal net operating loss carryforwards	126.5
Tax effected state net operating loss carryforwards	42.1
Foreign tax credits (expiring between fiscal 2025 and 2030)	9.7
State tax credits	11.9
Net decrease in valuation allowance	9.8	$ 1.5	$ 273.8
United States | Capital loss carryforwards
Tax Credit Carryforward [Line Items]
Capital loss carryforwards related to the private brands divestiture	2,600.0
State | Capital loss carryforwards
Tax Credit Carryforward [Line Items]
Capital loss carryforwards related to the private brands divestiture	165.0
Discontinued operations
Tax Credit Carryforward [Line Items]
Estimated decrease in gross unrecognized tax benefits	$ 6.6
Minimum
Tax Credit Carryforward [Line Items]
Statutes of limitations, term	3 years
Maximum
Tax Credit Carryforward [Line Items]
Statutes of limitations, term	5 years