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v3.25.2

Pension and Postretirement Benefit Plans (Tables) | 6 Months Ended
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Jun. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Pension and Postretirement Cost | Net periodic pension and postretirement benefit cost for the Company’s defined pension and postretirement benefit plans for the three and six months ended June 30, 2025 and 2024 are set forth below (in millions):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
Pension benefits |  | 2025 |  | 2024 |  | 2025 |  | 2024
Service cost |  | $ | 1.9 |  |  | $ | 2.1 |  |  | $ | 3.7 |  |  | $ | 4.2 |
Interest cost |  | 6.7 |  |  | 6.9 |  |  | 13.3 |  |  | 13.9 |
Expected return on plan assets |  | (6.5) |  |  | (7.7) |  |  | (12.8) |  |  | (15.4) |
Amortization of net actuarial losses |  | 2.3 |  |  | 2.2 |  |  | 4.4 |  |  | 4.4 |
Amortization of prior service cost |  | 0.4 |  |  | 0.4 |  |  | 0.8 |  |  | 0.7 |
Net periodic pension cost |  | $ | 4.8 |  |  | $ | 3.9 |  |  | $ | 9.4 |  |  | $ | 7.8 |
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
Postretirement benefits |  | 2025 |  | 2024 |  | 2025 |  | 2024
Service cost |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.1 |
Interest cost |  | 0.3 |  |  | 0.4 |  |  | 0.7 |  |  | 0.8 |
Amortization of net actuarial losses |  | (0.1) |  |  | — |  |  | (0.1) |  |  | — |
Amortization of prior service cost |  | 0.1 |  |  | — |  |  | 0.2 |  |  | 0.1 |
Net periodic postretirement benefit cost |  | $ | 0.3 |  |  | $ | 0.4 |  |  | $ | 0.8 |  |  | $ | 1.0 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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