FAIR VALUE MEASUREMENTS - Fair Value Hierarchy (Details) - Recurring - USD ($) $ in Millions	Aug. 26, 2018	May 27, 2018
Assets:
Deferred compensation assets	$ 0.5	$ 0.5
Derivative assets	0.4	0.8
Total assets	0.9	1.3
Liabilities:
Derivative liabilities	6.0	1.4
Deferred compensation liabilities	14.6	12.4
Total liabilities	20.6	13.8
Level 1
Assets:
Deferred compensation assets	0.5	0.5
Total assets	0.5	0.5
Level 2
Assets:
Derivative assets	0.4	0.8
Total assets	0.4	0.8
Liabilities:
Derivative liabilities	6.0	1.4
Deferred compensation liabilities	14.6	12.4
Total liabilities	$ 20.6	$ 13.8