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PENSION, POST-RETIREMENT AND POST-EMPLOYMENT PLANS - Changes in Funded Status of Pension and SERP Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Change in Plan Assets: |  |  |
Beginning of period balance | $ 173.4 |  |
End of period balance | 169.2 | $ 173.4 |
Pension and SERP Benefits | Domestic |  |  |
Change in Projected Benefit Obligation: |  |  |
Beginning of period balance | 176.6 | 175.2 |
Service cost | 0.0 | 0.0 | $ 0.0
Interest cost | 8.4 | 8.7 | 6.3
Plan curtailment | 0.0 | 0.0 |
Actuarial (gain) loss due to assumption change | (9.3) | 3.0 |
Actuarial (gain) loss due to plan experience | (1.7) | 1.3 |
Benefits and expenses paid | (12.3) | (11.6) |
Settlement | 0.0 | 0.0 |
Foreign currency translation | 0.0 | 0.0 |
End of period balance | 161.7 | 176.6 | 175.2
Change in Plan Assets: |  |  |
Beginning of period balance | 168.4 | 158.7 |
Actual return on plan assets, net of expenses | 7.1 | 20.8 |
Employer contributions | 0.8 | 0.5 |
Benefits paid | (12.3) | (11.6) |
Settlement | 0.0 | 0.0 |
Foreign currency translation | 0.0 | 0.0 |
End of period balance | 164.0 | 168.4 | 158.7
Funded Status |  |  |
Funded status of plan | 2.3 | (8.2) |
Supplemental Information: |  |  |
Accumulated benefit obligation | 161.7 | 176.6 |
Plans with Accumulated Benefit Obligation in excess of Plan Assets: |  |  |
Accumulated benefit obligation | 5.0 | 176.6 |
Fair value plan assets | 0.0 | 168.4 |
Plans with Projected Benefit Obligation in excess of Plan Assets: |  |  |
Projected benefit obligation | 5.0 | 176.6 |
Fair value plan assets | 0.0 | 168.4 |
Pension and SERP Benefits | Foreign |  |  |
Change in Projected Benefit Obligation: |  |  |
Beginning of period balance | 19.8 | 19.4 |
Service cost | 0.6 | 0.6 | 0.8
Interest cost | 0.6 | 0.7 | 0.3
Plan curtailment | 0.0 | (0.4) |
Actuarial (gain) loss due to assumption change | (0.2) | 0.8 |
Actuarial (gain) loss due to plan experience | 0.1 | 0.2 |
Benefits and expenses paid | (1.0) | (0.8) |
Settlement | (0.4) | (1.0) |
Foreign currency translation | (1.4) | 0.3 |
End of period balance | 18.1 | 19.8 | 19.4
Change in Plan Assets: |  |  |
Beginning of period balance | 5.0 | 4.9 |
Actual return on plan assets, net of expenses | 0.4 | 0.1 |
Employer contributions | 1.6 | 1.7 |
Benefits paid | (1.0) | (0.8) |
Settlement | (0.4) | (1.0) |
Foreign currency translation | (0.4) | 0.1 |
End of period balance | 5.2 | 5.0 | 4.9
Funded Status |  |  |
Funded status of plan | (12.9) | (14.8) |
Supplemental Information: |  |  |
Accumulated benefit obligation | 16.3 | 17.4 |
Plans with Accumulated Benefit Obligation in excess of Plan Assets: |  |  |
Accumulated benefit obligation | 14.5 | 15.5 |
Fair value plan assets | 2.6 | 2.5 |
Plans with Projected Benefit Obligation in excess of Plan Assets: |  |  |
Projected benefit obligation | 15.9 | 19.6 |
Fair value plan assets | 2.6 | 4.6 |
Post-retirement Medical Benefits | Domestic |  |  |
Change in Projected Benefit Obligation: |  |  |
Beginning of period balance | 5.4 | 5.9 |
Service cost | 0.0 | 0.0 |
Interest cost | 0.3 | 0.3 | 0.2
Plan curtailment | 0.0 | 0.0 |
Actuarial (gain) loss due to assumption change | (0.2) | 0.1 |
Actuarial (gain) loss due to plan experience | 0.1 | (0.5) |
Benefits and expenses paid | (0.4) | (0.4) |
Settlement | 0.0 | 0.0 |
Foreign currency translation | 0.0 | 0.0 |
End of period balance | 5.2 | 5.4 | 5.9
Change in Plan Assets: |  |  |
Beginning of period balance | 0.0 | 0.0 |
Actual return on plan assets, net of expenses | 0.0 | 0.0 |
Employer contributions | 0.4 | 0.4 |
Benefits paid | (0.4) | (0.4) |
Settlement | 0.0 | 0.0 |
Foreign currency translation | 0.0 | 0.0 |
End of period balance | 0.0 | 0.0 | $ 0.0
Funded Status |  |  |
Funded status of plan | (5.2) | (5.4) |
Supplemental Information: |  |  |
Accumulated benefit obligation | 5.2 | 5.4 |
Plans with Accumulated Benefit Obligation in excess of Plan Assets: |  |  |
Accumulated benefit obligation | 5.2 | 5.4 |
Fair value plan assets | 0.0 | 0.0 |
Plans with Projected Benefit Obligation in excess of Plan Assets: |  |  |
Projected benefit obligation | 5.2 | 5.4 |
Fair value plan assets | $ 0.0 | $ 0.0 |

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- Definition Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(8) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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