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INCENTIVE COMPENSATION (Schedule of Awards) (Details) - Restricted Stock Units (RSU) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2019
Apr. 01, 2018
Dec. 30, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards Granted (in shares) 898,000 708,000 1,069,000 389,000
Grant Date Fair Value per Award (in dollars per share) $ 16.47 $ 25.19    
Vesting Date Fair Value per Award (in dollars per share) $ 25.52 $ 0    
Awards Forfeited to Date (in shares) 218,000 389,000    
Awards Granted February 14, 2018        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards Granted (in shares) 410,000      
Grant Date Fair Value per Award (in dollars per share) $ 25.59      
Vesting Date Fair Value per Award (in dollars per share) $ 15.51      
Awards Forfeited to Date (in shares) 0      
Awards Granted March 1, 2018        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards Granted (in shares) 163,764      
Grant Date Fair Value per Award (in dollars per share) $ 24.93      
Vesting Date Fair Value per Award (in dollars per share) $ 15.51      
Awards Forfeited to Date (in shares) 45,755      
Expected compensation cost $ 2.9      
Awards Granted March 1, 2018        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards Granted (in shares) 283,525      
Grant Date Fair Value per Award (in dollars per share) $ 24.93      
Vesting Date Fair Value per Award (in dollars per share) $ 0      
Awards Forfeited to Date (in shares) 151,228      
Expected compensation cost $ 3.3      
Awards Granted May 10, 2018        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards Granted (in shares) 11,144      
Grant Date Fair Value per Award (in dollars per share) $ 21.54      
Vesting Date Fair Value per Award (in dollars per share) $ 0      
Awards Forfeited to Date (in shares) 0      
Awards Granted, December 18, 2018        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards Granted (in shares) 262,500      
Grant Date Fair Value per Award (in dollars per share) $ 16.06      
Vesting Date Fair Value per Award (in dollars per share) $ 0      
Awards Forfeited to Date (in shares) 0      
Awards Granted, January 7, 2019        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards Granted (in shares) 506,417      
Grant Date Fair Value per Award (in dollars per share) $ 16.47      
Vesting Date Fair Value per Award (in dollars per share) $ 0      
Awards Forfeited to Date (in shares) 83,705      
Expected compensation cost $ 7.0