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v3.25.3

Employee Benefit Plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Benefit Costs | The following table provides the components of the net periodic benefit cost for the defined benefit pension and OPEB plans.
| Three Months Ended September 30
| Pension Benefits |  |  |  |
| U.S. Plans |  | U.K. Plan |  | OPEB
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
| (in millions of dollars)
Service Cost | $ | 2.3 |  |  | $ | 2.3 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest Cost | 21.4 |  |  | 20.7 |  |  | 2.2 |  |  | 1.9 |  |  | 1.0 |  |  | 1.0 |
Expected Return on Plan Assets | (21.8) |  |  | (22.8) |  |  | (2.2) |  |  | (2.1) |  |  | (0.1) |  |  | (0.1) |
Amortization of: |  |  |  |  |  |  |  |  |  |  |
Net Actuarial Loss (Gain) | 3.8 |  |  | 3.7 |  |  | 0.7 |  |  | 0.7 |  |  | (0.3) |  |  | (0.2) |
Prior Service Credit | — |  |  | — |  |  | — |  |  | — |  |  | (0.1) |  |  | (0.1) |
Total Net Periodic Benefit Cost | $ | 5.7 |  |  | $ | 3.9 |  |  | $ | 0.7 |  |  | $ | 0.5 |  |  | $ | 0.5 |  |  | $ | 0.6 |
| Nine Months Ended September 30
| Pension Benefits |  |  |  |
| U.S. Plans |  | U.K. Plan |  | OPEB
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
| (in millions of dollars)
Service Cost | $ | 7.0 |  |  | $ | 6.9 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest Cost | 64.2 |  |  | 62.1 |  |  | 6.5 |  |  | 5.7 |  |  | 3.0 |  |  | 3.0 |
Expected Return on Plan Assets | (65.4) |  |  | (68.4) |  |  | (6.6) |  |  | (6.3) |  |  | (0.3) |  |  | (0.3) |
Amortization of: |  |  |  |  |  |  |  |  |  |  |
Net Actuarial Loss (Gain) | 11.2 |  |  | 11.0 |  |  | 2.1 |  |  | 2.2 |  |  | (0.9) |  |  | (0.8) |
Prior Service Credit | — |  |  | — |  |  | — |  |  | — |  |  | (0.2) |  |  | (0.2) |
Total Net Periodic Benefit Cost | $ | 17.0 |  |  | $ | 11.6 |  |  | $ | 2.0 |  |  | $ | 1.6 |  |  | $ | 1.6 |  |  | $ | 1.7 |

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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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