XML 69 R55.htm IDEA: XBRL DOCUMENT v3.25.1
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Credit) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Pension    
Components of Net Periodic Benefit Cost (Credit)    
Service Cost $ 1.6 $ 1.6
Interest Cost 10.0 9.7
Expected Return on Plan Assets (10.9) (11.2)
Amortization of Prior Service Credits 0.0 0.0
Amortization of Net Loss (Gain) 1.8 1.6
Net Periodic Benefit Cost (Credit) 2.5 1.7
Other Postretirement    
Components of Net Periodic Benefit Cost (Credit)    
Service Cost 0.4 0.4
Interest Cost 1.0 1.0
Expected Return on Plan Assets (2.7) (2.8)
Amortization of Prior Service Credits (1.4) (2.9)
Amortization of Net Loss (Gain) (0.7) (0.8)
Net Periodic Benefit Cost (Credit) $ (3.4) $ (5.1)