INCOME TAXES - General Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Feb. 28, 2021	Feb. 23, 2020	Feb. 28, 2021	Feb. 23, 2020
INCOME TAXES
Income tax expense	$ 16.3	$ 35.7	$ 76.2	$ 115.1
Effective income tax rate (as a percent)	19.80%	24.30%	23.20%	23.80%
Federal statutory tax rate (as a percent)	21.00%	21.00%	21.00%	21.00%

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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