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PENSION AND POSTRETIREMENT BENEFITS - Schedule of the Effect of a One Percentage Point Change in Assumed Health Care Cost Rates (Details)
$ in Millions
12 Months Ended
May 27, 2018
USD ($)
One Percent Increase  
Effect on total service and interest cost $ 0.3
Effect on postretirement benefit obligation 3.9
One Percent Decrease  
Effect on total service and interest cost (0.3)
Effect on postretirement benefit obligation $ (3.5)