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DERIVATIVE FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Nov. 25, 2018
Nov. 26, 2017
Nov. 25, 2018
Nov. 26, 2017
Aug. 26, 2018
May 27, 2018
Aug. 27, 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]                
Gain recognized in other comprehensive income $ 105.9 $ 1.0 $ 48.0 $ 1.0        
Deferred gain in AOCI upon settlement of contracts 7,303.3 $ 3,786.5 7,303.3 $ 3,786.5 $ 3,815.0 $ 3,756.6 $ 3,882.6 $ 4,077.8
Setoff amounts applied against total derivative assets 0.9   0.9     1.4    
Setoff amounts applied against total derivative liabilities 1.8   1.8     0.4    
Level 2                
Derivative Instruments, Gain (Loss) [Line Items]                
Maximum amount of loss due to credit risk of counterparties 2.3   2.3          
Cash flow hedge, Pinnacle                
Derivative Instruments, Gain (Loss) [Line Items]                
Gain recognized in other comprehensive income 47.5              
Foreign exchange contracts                
Derivative Instruments, Gain (Loss) [Line Items]                
Notional value of contracts 66.6   66.6     82.4    
Purchase contracts | Commodity contracts                
Derivative Instruments, Gain (Loss) [Line Items]                
Notional value of contracts 189.3   189.3     100.0    
Sales contracts | Commodity contracts                
Derivative Instruments, Gain (Loss) [Line Items]                
Notional value of contracts 57.3   57.3     34.2    
Prepaid expenses and other current assets                
Derivative Instruments, Gain (Loss) [Line Items]                
Amounts representing a right to reclaim cash collateral 0.9   0.9          
Amounts representing an obligation to return cash collateral           1.0    
Accumulated Gain (Loss), Net, Cash Flow Hedge                
Derivative Instruments, Gain (Loss) [Line Items]                
Deferred gain in AOCI upon settlement of contracts 36.8   36.8     $ 1.0    
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 $ 47.3   $ 47.3