Annual report [Section 13 and 15(d), not S-K Item 405]

BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details)

v3.25.4
BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Recognized actuarial (gain) loss - mark to market $ (0.6) $ 11.6  
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.6 0.8 $ 1.2
Interest cost 24.4 24.2 27.4
Expected return on plan assets (20.4) (22.5) (22.8)
Amortization of prior service cost 0.5 0.6 0.4
Recognized actuarial (gain) loss - mark to market (0.8) 11.7 1.9
Total net periodic benefit cost (income) 4.3 14.8 8.1
Other Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.1 0.1 0.1
Interest cost 0.5 0.6 0.7
Expected return on plan assets (0.6) (0.7) (0.6)
Amortization of prior service cost (0.4) (0.5) (0.5)
Recognized actuarial (gain) loss - mark to market 0.2 (0.1) (1.8)
Total net periodic benefit cost (income) $ (0.2) $ (0.6) $ (2.1)