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Pension Benefit Plans | 6 Months Ended
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Jun. 30, 2022
Retirement Benefits [Abstract] |
Pension Benefit Plans | The components of net periodic benefit cost for pension benefits were as follows (in millions):
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Service cost | $ | 1.1 |  |  | $ | 1.5 |  |  | $ | 2.1 |  |  | $ | 3.1 |
Interest cost | 1.5 |  |  | 1.5 |  |  | 3.0 |  |  | 3.1 |
Expected return on plan assets | (2.3) |  |  | (2.7) |  |  | (4.6) |  |  | (5.5) |
Amortization of prior service cost | — |  |  | 0.1 |  |  | — |  |  | 0.1 |
Recognized actuarial loss | 1.3 |  |  | 2.1 |  |  | 2.9 |  |  | 4.2 |
Other | — |  |  | — |  |  | (0.1) |  |  | (0.3) |
Settlements and curtailments | 0.2 |  |  | — |  |  | 0.3 |  |  | 0.7 |
Net periodic benefit cost | $ | 1.8 |  |  | $ | 2.5 |  |  | $ | 3.6 |  |  | $ | 5.4 |

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