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Components of Net Periodic Benefit Cost (Tables) | 3 Months Ended
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Mar. 31, 2024
Retirement Benefits [Abstract] |
Schedule of net periodic benefit cost |
|  | Pension Benefits
|  | Three months ended March 31, |  |
|  | 2024 |  | 2023 |  |  |  |
Service cost |  | $ | 0.6 |  |  | $ | 1.1 |  |  |  |  |
Interest cost |  | 3.5 |  |  | 2.6 |  |  |  |  |
Expected return on plan assets |  | (3.8) |  |  | (5.9) |  |  |  |  |
Amortization of prior service costs |  | 0.1 |  |  | — |  |  |  |  |
Amortization of net loss |  | 1.7 |  |  | 0.9 |  |  |  |  |
Net periodic benefit cost (income) |  | $ | 2.1 |  |  | $ | (1.3) |  |  |  |  |
|  | Other Postretirement Benefits
|  | Three months ended March 31, |  |
|  | 2024 |  | 2023 |  |  |  |
Interest cost |  | $ | 1.0 |  |  | $ | 0.7 |  |  |  |  |
Amortization of net loss |  | — |  |  | 0.3 |  |  |  |  |
Net periodic benefit cost |  | $ | 1.0 |  |  | $ | 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://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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