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EMPLOYEE BENEFIT PLANS (Net Periodic Benefit Costs) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Net Periodic Benefit Cost        
Attempted plan funded status, minimum, percentage   80.00%    
Pension Benefits        
Net Periodic Benefit Cost        
Service cost   $ 0.6 $ 0.6 $ 0.6
Interest cost   4.3 6.1 6.4
Expected return on assets   (3.9) (7.5) (7.2)
Transition obligation   0.0 0.0 0.0
Settlement cost   0.0 0.0 0.0
Prior service cost   0.0 0.0 0.0
Actuarial loss   0.9 (2.3) (2.1)
Settlement cost   0.0 0.0 0.0
Net periodic benefit cost   56.8 1.5 1.9
Pension Benefits | Terminated Plan        
Net Periodic Benefit Cost        
Settlement cost $ (55.3) (54.9) 0.0 0.0
Other Benefits        
Net Periodic Benefit Cost        
Service cost   0.0 0.0 0.0
Interest cost   0.2 0.3 0.3
Expected return on assets   0.0 0.0
Transition obligation   0.0 0.0 0.0
Settlement cost   0.0 0.0 0.0
Prior service cost   0.0 0.0 0.0
Actuarial loss   0.0 0.0 0.0
Settlement cost   0.0 0.0 0.0
Net periodic benefit cost   $ 0.2 $ 0.3 $ 0.3