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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Nov. 01, 2016
Nov. 27, 2016
Nov. 27, 2016
Nov. 29, 2015
Nov. 09, 2016
May 29, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cash distribution from Lamb Weston     $ 489.1 $ 0.0    
Remaining portion of cash distribution   $ 753.4 753.4      
Income tax benefit recognized   $ 2.4 14.0      
Cumulative effect on retained earnings, net of tax           $ (3.9)
Increase in cash flows from operating activities     542.2 352.1    
Decrease in cash flows from financing activities     $ 80.9 166.8    
Retained Earnings            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect on retained earnings, net of tax           (3.9)
New Accounting Pronouncement, Early Adoption, Effect | ASU 2016-09            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Increase in cash flows from operating activities       34.1    
Decrease in cash flows from financing activities       $ 34.1    
New Accounting Pronouncement, Early Adoption, Effect | ASU 2016-09 | Retained Earnings            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Cumulative effect on retained earnings, net of tax           $ 3.9
Discontinued operations, spinoff | Lamb Weston            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]            
Distribution of the Company's interest in Lamb Weston (as a percent)         100.00%  
Cash distribution from Lamb Weston $ 823.5