INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 25, 2019	Aug. 26, 2018	May 26, 2019
Income Tax Contingency [Line Items]
Income tax expense (benefit)	$ (11.5)	$ 57.4
Effective tax rate	(7.00%)	24.40%
Gross unrecognized tax benefits for uncertain tax positions	$ 39.6		$ 44.1
Tax positions for which ultimate deductibility is highly certain but timing of such deductibility is uncertain	1.0		1.0
Related liabilities for gross interest and penalties	7.3		11.7
Net amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate	33.8		37.3
Gross unrecognized tax benefits, estimated decrease over the next twelve months (up to)	15.9
Deferred tax asset	688.9		687.1
Corresponding valuation allowances	688.9		687.1
Discontinued operations
Income Tax Contingency [Line Items]
Net amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate	$ 6.7		$ 6.7