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v3.23.1

Benefit Plans | 3 Months Ended
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Mar. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract] |
Benefit Plans | Benefit Plans The components of net periodic benefit cost for the three months ended March 31 were as follows:
| Pension benefits |  | Other retirement benefits |  | Total
($ in millions) | 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022
Service cost | $ | 0.3 |  |  | $ | 0.4 |  |  | $ | — |  |  | $ | — |  |  | $ | 0.3 |  |  | $ | 0.4 |
Interest cost | 0.6 |  |  | 1.6 |  |  | 0.1 |  |  | — |  |  | 0.7 |  |  | 1.6 |
Expected return on assets | (0.3) |  |  | (2.2) |  |  | — |  |  | — |  |  | (0.3) |  |  | (2.2) |
Recognized actuarial losses (gains) | 0.1 |  |  | 0.4 |  |  | (0.5) |  |  | (0.4) |  |  | (0.4) |  |  | — |
Settlements | — |  |  | 0.6 |  |  | — |  |  | — |  |  | — |  |  | 0.6 |
Net periodic benefit cost | $ | 0.7 |  |  | $ | 0.8 |  |  | $ | (0.4) |  |  | $ | (0.4) |  |  | $ | 0.3 |  |  | $ | 0.4 |
| Pension benefits |  | Other retirement benefits |  | Total
($ in millions) | 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022
U.S. plans | $ | 0.1 |  |  | $ | 0.4 |  |  | $ | (0.4) |  |  | $ | (0.4) |  |  | $ | (0.3) |  |  | $ | — |
International plans | 0.6 |  |  | 0.4 |  |  | — |  |  | — |  |  | 0.6 |  |  | 0.4 |
Net periodic benefit cost | $ | 0.7 |  |  | $ | 0.8 |  |  | $ | (0.4) |  |  | $ | (0.4) |  |  | $ | 0.3 |  |  | $ | 0.4 |
During the three months ended March 31, 2022, we recorded a pension settlement charge of $0.6 million within other nonoperating expense (income), as we determined that normal-course lump-sum payments for our U.S. qualified defined benefit pension plan exceeded the threshold for settlement accounting under U.S. GAAP for the year.

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