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DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 25, 2019
Nov. 25, 2018
Aug. 26, 2018
May 26, 2019
May 27, 2018
Derivative Instruments, Gain (Loss) [Line Items]          
Period to hedge portion of anticipated consumption of commodity inputs (up to) 36 months        
Gain recognized in other comprehensive income $ (1.6)   $ (57.9)    
Deferred gain in AOCI upon settlement of contracts 7,516.8   $ 3,815.0 $ 7,463.7 $ 3,756.6
Setoff amounts applied against total derivative assets 1.4     0.5  
Setoff amounts applied against total derivative liabilities 2.5     0.4  
Level 2          
Derivative Instruments, Gain (Loss) [Line Items]          
Maximum amount of loss due to credit risk of counterparties 0.7        
Prepaid expenses and other current assets          
Derivative Instruments, Gain (Loss) [Line Items]          
Amounts representing a right to reclaim cash collateral 1.4        
Amounts representing an obligation to return cash collateral       0.1  
Cash flow hedge, Pinnacle          
Derivative Instruments, Gain (Loss) [Line Items]          
Gain recognized in other comprehensive income   $ 47.5      
Commodity contracts | Purchase contracts          
Derivative Instruments, Gain (Loss) [Line Items]          
Notional value of contracts 62.7     140.1  
Commodity contracts | Sales contracts          
Derivative Instruments, Gain (Loss) [Line Items]          
Notional value of contracts 14.8     18.5  
Foreign exchange contracts          
Derivative Instruments, Gain (Loss) [Line Items]          
Notional value of contracts 99.8     88.2  
Accumulated Gain (Loss), Net, Cash Flow Hedge          
Derivative Instruments, Gain (Loss) [Line Items]          
Deferred gain in AOCI upon settlement of contracts 32.2     $ 34.0  
Accumulated Gain (Loss), Net, Cash Flow Hedge | Cash flow hedge, Pinnacle          
Derivative Instruments, Gain (Loss) [Line Items]          
Deferred gain in AOCI upon settlement of contracts $ 44.6