FAIR VALUE MEASUREMENTS (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Nov. 23, 2014	May 25, 2014
Assets:
Derivative assets	$ 31.2	$ 38.8
Available-for-sale securities	2.5	2.1
Deferred compensation assets	5.6	5.6
Total assets	39.3	46.5
Liabilities:
Derivative liabilities	22.6	10.4
Deferred compensation liabilities	48.9	43.7
Total liabilities	71.5	54.1
Level 1
Assets:
Derivative assets	10.5	8.5
Available-for-sale securities	2.5	2.1
Deferred compensation assets	5.6	5.6
Total assets	18.6	16.2
Liabilities:
Derivative liabilities	0	0
Deferred compensation liabilities	48.9	43.7
Total liabilities	48.9	43.7
Level 2
Assets:
Derivative assets	20.7	30.3
Available-for-sale securities	0	0
Deferred compensation assets	0	0
Total assets	20.7	30.3
Liabilities:
Derivative liabilities	22.6	10.4
Deferred compensation liabilities	0	0
Total liabilities	22.6	10.4
Level 3
Assets:
Derivative assets	0	0
Available-for-sale securities	0	0
Deferred compensation assets	0	0
Total assets	0	0
Liabilities:
Derivative liabilities	0	0
Deferred compensation liabilities	0	0
Total liabilities	$ 0	$ 0