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DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Nov. 26, 2017
May 28, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Period to hedge portion of anticipated consumption of commodity inputs (up to) 36 months  
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative asset prior to offsetting to total derivative $ 0.1 $ 0.5
Derivative liability prior to offsetting to total derivative 1.0 1.4
Level 2    
Derivative Instruments, Gain (Loss) [Line Items]    
Maximum amount of loss due to credit risk of counterparties 0.9  
Foreign exchange contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of contracts 72.8 81.9
Purchase contracts | Commodity contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of contracts 81.6 76.8
Sales contracts | Commodity contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional value of contracts 34.2 73.4
Prepaid expenses and other current assets    
Derivative Instruments, Gain (Loss) [Line Items]    
Amounts representing a right to reclaim cash collateral $ 0.9 $ 0.9