SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Income Tax Expense (Benefit)) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 24, 2013	Nov. 25, 2012	Nov. 24, 2013	Nov. 25, 2012
Accounting Policies [Abstract]
Net derivative adjustment	$ (3.6)	$ (0.1)	$ 23.3	$ (1.7)
Unrealized gains on available-for-sale securities	0.1	0	0.2	0
Pension and postretirement healthcare liabilities	0.7	0.1	0.7	0.6
Other comprehensive income tax, total	$ (2.8)	$ 0	$ 24.2	$ (1.1)