LEASES - Lease Expense - Total (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Feb. 23, 2020	Feb. 23, 2020
Lease expense
Operating lease costs	$ 8.9	$ 20.3
Short-term, variable, and other lease costs, net	0.6	4.6
Sublease income	(0.8)	(2.0)
Amortization of lease assets	0.9	2.4
Interest on lease liabilities	0.1	0.5
Total lease costs, net	$ 9.7	$ 25.8