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

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