v3.25.4
EMPLOYEE BENEFIT PLANS (Net Periodic Benefit Cost) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Qualified Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 53.2 $ 53.4 $ 48.1
Interest cost 25.0 20.3 17.7
Expected return on plan assets (27.6) (24.4) (19.2)
Amortization of prior service cost and actuarial loss 0.2 0.3 0.0
Net periodic benefit cost 50.8 49.6 46.6
Post-Retirement Medical Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.7 0.9 0.5
Interest cost 0.8 0.9 0.7
Expected return on plan assets 0.0 0.0 0.0
Amortization of prior service cost and actuarial loss 0.3 0.5 0.1
Net periodic benefit cost $ 1.8 $ 2.3 $ 1.3