v3.25.2
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Changes in accumulated other comprehensive income (loss) by component, net of taxes            
Balance at the beginning of the period $ 2,633.2 $ 2,652.0 $ 2,373.8 $ 2,400.7 $ 2,652.0 $ 2,400.7
Other adjustments 1.4   0.3   1.9 (0.5)
Balance at the end of the period 2,618.0 2,633.2 2,398.5 2,373.8 2,618.0 2,398.5
Pensions            
Changes in accumulated other comprehensive income (loss) by component, net of taxes            
Balance at the beginning of the period (14.0) (14.0) (20.2) (20.3) (14.0) (20.3)
Amortization of net actuarial gain (loss)     0.1 0.1    
Balance at the end of the period (14.0) (14.0) (20.1) (20.2) (14.0) (20.1)
Post Retirement            
Changes in accumulated other comprehensive income (loss) by component, net of taxes            
Balance at the beginning of the period 7.3 8.1 10.1 11.0 8.1 11.0
Amortization of prior service cost (0.7) (0.7) (0.7) (0.7)    
Amortization of net actuarial gain (loss) (0.2) (0.1) (0.1) (0.2)    
Balance at the end of the period 6.4 7.3 9.3 10.1 6.4 9.3
Non-Qualified Plans            
Changes in accumulated other comprehensive income (loss) by component, net of taxes            
Balance at the beginning of the period (0.4) (0.4) (0.2) (0.2) (0.4) (0.2)
Balance at the end of the period (0.4) (0.4) (0.2) (0.2) (0.4) (0.2)
Other            
Changes in accumulated other comprehensive income (loss) by component, net of taxes            
Balance at the beginning of the period 0.3 (0.2) 0.5 1.3 (0.2) 1.3
Foreign currency exchange 1.4 0.3 0.3 (0.9)    
Other adjustments   0.2   0.1    
Balance at the end of the period 1.7 0.3 0.8 0.5 1.7 0.8
Accumulated Other Comprehensive Income (Loss)            
Changes in accumulated other comprehensive income (loss) by component, net of taxes            
Balance at the beginning of the period (6.8) (6.5) (9.8) (8.2) (6.5) (8.2)
Amortization of prior service cost (0.7) (0.7) (0.7) (0.7)    
Amortization of net actuarial gain (loss) (0.2) (0.1)   (0.1)    
Foreign currency exchange 1.4 0.3 0.3 (0.9)    
Other adjustments   0.2   0.1    
Balance at the end of the period $ (6.3) $ (6.8) $ (10.2) $ (9.8) $ (6.3) $ (10.2)