FAIR VALUE MEASUREMENTS - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Feb. 25, 2018	May 28, 2017
Assets:
Derivative assets	$ 2.5	$ 2.3
Available-for-sale securities	4.9	3.5
Total assets	7.4	5.8
Liabilities:
Derivative liabilities	0.8	1.3
Deferred compensation liabilities	51.4	47.2
Total liabilities	52.2	48.5
Level 1
Assets:
Derivative assets	1.9	2.0
Available-for-sale securities	4.9	3.5
Total assets	6.8	5.5
Liabilities:
Derivative liabilities	0.0	0.0
Deferred compensation liabilities	51.4	47.2
Total liabilities	51.4	47.2
Level 2
Assets:
Derivative assets	0.6	0.3
Available-for-sale securities	0.0	0.0
Total assets	0.6	0.3
Liabilities:
Derivative liabilities	0.8	1.3
Deferred compensation liabilities	0.0	0.0
Total liabilities	0.8	1.3
Level 3
Assets:
Derivative assets	0.0	0.0
Available-for-sale securities	0.0	0.0
Total assets	0.0	0.0
Liabilities:
Derivative liabilities	0.0	0.0
Deferred compensation liabilities	0.0	0.0
Total liabilities	$ 0.0	$ 0.0