Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Reconciliation of Projected Benefit Obligations, Plan Assets and Funded Status of Plans (Details)

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BENEFIT PLANS - Reconciliation of Projected Benefit Obligations, Plan Assets and Funded Status of Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in plan assets      
Beginning balance $ 363.5    
Ending balance   $ 363.5  
Pension Benefits      
Change in projected benefit obligation      
Benefit obligation at January 1, 466.1 501.1  
Service cost 0.8 1.2 $ 1.5
Interest cost 24.2 27.4 20.1
Amendments 0.0 0.0  
Actuarial (gain) loss (9.5) 11.3  
Foreign currency exchange rate changes 0.0 0.0  
Settlements 0.0 (34.5)  
Benefits paid (39.8) (40.4)  
Projected benefit obligation at December 31, 441.8 466.1 501.1
Change in plan assets      
Beginning balance 363.5 399.0  
Actual return on plan assets 1.3 30.6  
Employer contributions 6.9 7.0  
Other disbursements 0.0 (0.9)  
Settlements 0.0 (31.8)  
Benefits paid (39.8) (40.4)  
Ending balance 331.9 363.5 399.0
Funded status of plan (109.9) (102.6)  
Other Benefits      
Change in projected benefit obligation      
Benefit obligation at January 1, 11.1 12.8  
Service cost 0.1 0.1 0.2
Interest cost 0.6 0.7 0.5
Amendments 0.0 0.3  
Actuarial (gain) loss (0.7) (1.5)  
Foreign currency exchange rate changes (0.1) 0.0  
Settlements 0.0 0.0  
Benefits paid (1.3) (1.3)  
Projected benefit obligation at December 31, 9.7 11.1 12.8
Change in plan assets      
Beginning balance 10.7 10.7  
Actual return on plan assets 0.0 1.0  
Employer contributions 0.2 0.2  
Other disbursements 0.0 0.0  
Settlements 0.0 0.0  
Benefits paid (0.2) (1.2)  
Ending balance 10.7 10.7 $ 10.7
Funded status of plan $ 1.0 $ (0.4)