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EMPLOYEE BENEFIT PLANS - Schedule of Change in Benefit Obligation, Change in Plan Assets and Components of Funded Status (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Pension Benefits |  |  |
Change in benefit obligation: |  |  |
Projected benefit obligation - beginning of year | $ 423.8 | $ 433.8 |
Service cost | 2.7 | 3.1 | $ 4.1
Interest cost | 18.2 | 19.6 | 14.1
Actuarial (gain) / loss | (9.1) | 9.2 |
Benefits paid | (39.1) | (44.8) |
Other | (4.8) | 2.9 |
Projected benefit obligation - end of year | 391.7 | 423.8 | 433.8
Projected salary increases | (5.5) | (6.5) |
Accumulated benefit obligation | 386.2 | 417.3 |
Change in plan assets: |  |  |
Plan assets - beginning of year | 400.5 | 396.6 |
Actual return on plan assets | 17.9 | 37.7 |
Company contributions | 7.0 | 9.1 |
Benefits paid | (39.1) | (44.8) |
Other | 0.2 | 1.9 |
Plan assets - end of year | 386.5 | 400.5 | 396.6
Unfunded status at end of year | (5.2) | (23.3) |
Health Care Benefits |  |  |
Change in benefit obligation: |  |  |
Projected benefit obligation - beginning of year | 4.4 | 5.9 |
Service cost | 0.0 | 0.0 | 0.0
Interest cost | 0.2 | 0.3 | 0.4
Actuarial (gain) / loss | (0.7) | (1.0) |
Benefits paid | (0.4) | (0.9) |
Other | (0.1) | 0.1 |
Projected benefit obligation - end of year | 3.4 | 4.4 | 5.9
Projected salary increases | 0.0 | 0.0 |
Accumulated benefit obligation | 3.4 | 4.4 |
Change in plan assets: |  |  |
Plan assets - beginning of year | 0.0 | 0.0 |
Actual return on plan assets | 0.0 | 0.0 |
Company contributions | 0.4 | 0.9 |
Benefits paid | (0.4) | (0.9) |
Other | 0.0 | 0.0 |
Plan assets - end of year | 0.0 | 0.0 | $ 0.0
Unfunded status at end of year | $ (3.4) | $ (4.4) |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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