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Pensions (Tables) | 9 Months Ended
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Sep. 30, 2021
Retirement Benefits [Abstract] |
Summary of Components of Net Periodic Pension (Benefit) Expense | The following table summarizes the components of Net periodic pension benefit:
| U.S. Benefit Plan |  | Non-U.S. Benefit Plan
| Three Months Ended September 30, |  | Nine Months Ended September 30, |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions) | 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020 |  | 2021 |  | 2020
Service cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 0.1 |  |  | $ | 0.1 |
Interest cost | 1.2 |  |  | 1.5 |  |  | 3.6 |  |  | 4.3 |  |  | 0.2 |  |  | 0.2 |  |  | 0.5 |  |  | 0.7 |
Amortization of actuarial loss | 1.0 |  |  | 0.8 |  |  | 2.9 |  |  | 2.4 |  |  | 0.2 |  |  | 0.2 |  |  | 0.6 |  |  | 0.4 |
Amortization of prior service cost | — |  |  | — |  |  | — |  |  | — |  |  | 0.1 |  |  | — |  |  | 0.2 |  |  | 0.1 |
Expected return on plan assets | (2.4) |  |  | (2.3) |  |  | (7.2) |  |  | (6.9) |  |  | (0.5) |  |  | (0.5) |  |  | (1.5) |  |  | (1.4) |
Net periodic pension benefit | $ | (0.2) |  |  | $ | — |  |  | $ | (0.7) |  |  | $ | (0.2) |  |  | $ | — |  |  | $ | (0.1) |  |  | $ | (0.1) |  |  | $ | (0.1) |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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