EMPLOYEE BENEFIT PLANS AND OTHER POST-RETIREMENT BENEFITS - Change in Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	May 29, 2022	May 30, 2021	May 31, 2020
Pension Plans
Change in Benefit Obligation
Benefit obligation at beginning of year	$ 41.5	$ 37.3
Service cost	2.1	3.0	$ 3.1
Interest cost	1.3	1.2	1.1
Plan amendments	0.1
Benefits paid	(0.4)	(0.5)
Actuarial (gain) loss	(8.5)	0.5
Benefit obligation at fiscal year-end	36.1	41.5	37.3
Accumulated benefit obligation portion of above	36.1	41.5
Post-Retirement Plan
Change in Benefit Obligation
Benefit obligation at beginning of year	6.5	6.5
Interest cost	0.1	0.1	0.2
Participant contributions	0.3	0.3
Benefits paid	(0.3)	(0.2)
Actuarial (gain) loss	(1.1)	(0.2)
Benefit obligation at fiscal year-end	$ 5.5	$ 6.5	$ 6.5