FAIR VALUE MEASUREMENTS - Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Feb. 23, 2020	May 26, 2019
Assets:
Derivative assets	$ 2.5	$ 5.9
Marketable securities	10.9	15.7
Deferred compensation assets	9.2	10.7
Total assets	22.6	32.3
Liabilities:
Derivative liabilities	1.9	1.4
Deferred compensation liabilities	71.6	70.4
Total liabilities	73.5	71.8
Level 1
Assets:
Derivative assets	2.5	3.0
Marketable securities	10.9	15.7
Deferred compensation assets	9.2	10.7
Total assets	22.6	29.4
Liabilities:
Derivative liabilities	0.0	0.0
Deferred compensation liabilities	71.6	70.4
Total liabilities	71.6	70.4
Level 2
Assets:
Derivative assets	0.0	2.9
Marketable securities	0.0	0.0
Deferred compensation assets	0.0	0.0
Total assets	0.0	2.9
Liabilities:
Derivative liabilities	1.9	1.4
Deferred compensation liabilities	0.0	0.0
Total liabilities	1.9	1.4
Level 3
Assets:
Derivative assets	0.0	0.0
Marketable securities	0.0	0.0
Deferred compensation assets	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