FAIR VALUE MEASUREMENTS - Fair Value Hierarchy (Details) - Recurring - USD ($) $ in Millions	Feb. 23, 2020	May 26, 2019
Assets:
Deferred compensation assets	$ 0.4	$ 0.5
Derivative assets	1.4	0.4
Total assets	1.8	0.9
Liabilities:
Derivative liabilities		3.8
Deferred compensation liabilities	20.1	15.1
Total liabilities	20.1	18.9
Level 1
Assets:
Deferred compensation assets	0.4	0.5
Total assets	0.4	0.5
Level 2
Assets:
Derivative assets	1.4	0.4
Total assets	1.4	0.4
Liabilities:
Derivative liabilities		3.8
Deferred compensation liabilities	20.1	15.1
Total liabilities	$ 20.1	$ 18.9