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PENSION AND POSTRETIREMENT BENEFITS - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 4 Months Ended 5 Months Ended 9 Months Ended
Apr. 03, 2018
Feb. 25, 2018
Nov. 26, 2017
Feb. 26, 2017
Sep. 30, 2017
Feb. 25, 2018
Feb. 25, 2018
Feb. 26, 2017
Aug. 27, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]                  
Discount rate         3.78%       3.90%
Curtailment and related remeasurement, net decrease in underfunded status of plan     $ 43.5            
Multi-employer pension plans, withdrawal costs   $ (1.7)   $ 2.0     $ 0.4 $ 2.0  
Pension Benefits                  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]                  
Recognized net actuarial loss   0.0 (3.4) 0.0     (3.4) 0.0  
Curtailment loss   0.0 $ 0.7 0.0     0.7 0.0  
Weighted average discount rate for service costs         4.19% 4.04%      
Weighted average discount rate for interest costs         3.26% 3.24%      
Employer contributions to pension and other postretirement plans   3.6         9.7    
Anticipated further contributions for the remainder of fiscal 2018   3.2       $ 3.2 3.2    
Postretirement Benefits                  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]                  
Recognized net actuarial loss   0.0   $ (0.1)     0.0 $ (0.3)  
Employer contributions to pension and other postretirement plans   1.5         8.4    
Anticipated further contributions for the remainder of fiscal 2018   $ 9.0       $ 9.0 $ 9.0    
Subsequent Event                  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]                  
Employer contributions to pension and other postretirement plans $ 300.0