Employee Benefit Plans (Details) - Pension Plan - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 27, 2021	Feb. 29, 2020	Feb. 27, 2021	Feb. 29, 2020
Defined Benefit Plan Disclosure
Interest cost	$ 0.7	$ 0.6	$ 2.1	$ 1.8
Expected return on plan assets	(1.5)	(1.1)	(4.3)	(3.3)
Net amortization loss	1.7	0.9	5.0	2.5
Net periodic benefit cost	$ 0.9	$ 0.4	$ 2.8	$ 1.0