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EMPLOYEE BENEFIT PLANS (Pre-tax Amounts Recognized in Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Qualified Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prior service costs | $ 0.0 | $ 0.0 | $ 0.0
Net actuarial (gain) loss | (21.1) | (5.9) | (10.7)
Amortization of losses and prior service cost | (0.1) | (0.3) | (0.3)
Total changes in other comprehensive (income) loss | (21.2) | (6.2) | (11.0)
Post-Retirement Medical Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Prior service costs | 0.0 | 1.8 | 0.0
Net actuarial (gain) loss | (4.0) | 1.9 | (2.3)
Amortization of losses and prior service cost | (0.7) | (0.6) | (0.5)
Total changes in other comprehensive (income) loss | $ (4.7) | $ 3.1 | $ (2.8)

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