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Pension and Post-Employment Benefits (Tables) | 6 Months Ended
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Jun. 30, 2024
Plan Net Pension Credit | The net periodic benefit of these plans is shown in the following table:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
(in millions) |  | 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Service cost |  | $ | (0.9 | ) |  | $ | (0.9 | ) |  | $ | (1.7 | ) |  | $ | (1.8 | )
Interest cost on projected benefit obligation |  |  | (4.6 | ) |  |  | (5.0 | ) |  |  | (9.3 | ) |  |  | (9.9 | )
Expected return on plan assets |  |  | 6.4 |  |  |  | 6.3 |  |  |  | 12.8 |  |  |  | 12.5 |
Amortization of prior service cost |  |  | (0.2 | ) |  |  | (0.1 | ) |  |  | (0.3 | ) |  |  | (0.2 | )
Amortization of actuarial net gains/(losses) |  |  | — |  |  |  | 0.5 |  |  |  | 0.1 |  |  |  | 1.0 |
Net periodic benefit |  | $ | 0.7 |  |  | $ | 0.8 |  |  | $ | 1.6 |  |  | $ | 1.6 |

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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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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration