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PENSION AND POSTRETIREMENT BENEFITS - Narrative (Details) - USD ($)
$ in Millions
2 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended
Nov. 26, 2017
Nov. 26, 2017
Nov. 27, 2016
Sep. 30, 2017
Nov. 26, 2017
Nov. 27, 2016
Aug. 27, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate       3.78%     3.90%
Multiemployer plans, withdrawal obligation     $ 2.1     $ 2.1  
Curtailment and related remeasurement, net decrease in underfunded status of plan   $ 43.5          
Pension Benefits              
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Weighted average discount rate for service costs 4.04%       4.19%    
Weighted average discount rate for interest costs 3.24%     3.26%      
Employer contributions to pension and other postretirement plans   2.3     $ 6.1    
Anticipated further contributions for the remainder of fiscal 2018 $ 6.8 6.8     6.8    
Recognized net actuarial loss   3.4 0.0   3.4 0.0  
Curtailment loss   0.7 0.0   0.7 0.0  
Postretirement Benefits              
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Employer contributions to pension and other postretirement plans   3.0     6.9    
Anticipated further contributions for the remainder of fiscal 2018 $ 11.8 11.8     11.8    
Recognized net actuarial loss   $ 0.0 $ 0.1   $ 0.0 $ 0.2