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Benefit Plans | 6 Months Ended
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Jun. 30, 2020
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 June 30 were as follows:
| Pension benefits |  |  |  | Other retirement benefits |  |  |  | Total |  |
($ in millions) | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | $ | 0.3 |  |  | $ | 0.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 0.3 |  |  | $ | 0.3 |
Interest cost | 1.9 |  |  | 2.5 |  |  | — |  |  | — |  |  | 1.9 |  |  | 2.5 |
Expected return on assets | (3.0) |  |  | (2.9) |  |  | — |  |  | — |  |  | (3.0) |  |  | (2.9) |
Amortization of prior service credit | — |  |  | — |  |  | (0.1) |  |  | (0.1) |  |  | (0.1) |  |  | (0.1) |
Recognized actuarial losses (gains) | 0.5 |  |  | 0.6 |  |  | (0.4) |  |  | (0.6) |  |  | 0.1 |  |  | — |
Settlements | 0.9 |  |  | — |  |  | — |  |  | — |  |  | 0.9 |  |  | — |
Net periodic benefit cost | $ | 0.6 |  |  | $ | 0.5 |  |  | $ | (0.5) |  |  | $ | (0.7) |  |  | $ | 0.1 |  |  | $ | (0.2) |
| Pension benefits |  |  |  | Other retirement benefits |  |  |  | Total |  |
($ in millions) | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
U.S. plans | $ | 0.2 |  |  | $ | — |  |  | $ | (0.5) |  |  | $ | (0.7) |  |  | $ | (0.3) |  |  | $ | (0.7) |
International plans | 0.4 |  |  | 0.5 |  |  | — |  |  | — |  |  | 0.4 |  |  | 0.5 |
Net periodic benefit cost | $ | 0.6 |  |  | $ | 0.5 |  |  | $ | (0.5) |  |  | $ | (0.7) |  |  | $ | 0.1 |  |  | $ | (0.2) |
The components of net periodic benefit cost for the six months ended June 30 were as follows:
| Pension benefits |  |  |  | Other retirement benefits |  |  |  | Total |  |
($ in millions) | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | $ | 0.6 |  |  | $ | 0.7 |  |  | $ | — |  |  | $ | — |  |  | $ | 0.6 |  |  | $ | 0.7 |
Interest cost | 3.9 |  |  | 4.9 |  |  | 0.1 |  |  | 0.1 |  |  | 4.0 |  |  | 5.0 |
Expected return on assets | (6.0) |  |  | (5.8) |  |  | — |  |  | — |  |  | (6.0) |  |  | (5.8) |
Amortization of prior service credit | — |  |  | — |  |  | (0.3) |  |  | (0.3) |  |  | (0.3) |  |  | (0.3) |
Recognized actuarial losses (gains) | 1.0 |  |  | 1.1 |  |  | (0.8) |  |  | (1.1) |  |  | 0.2 |  |  | — |
Settlements | 2.3 |  |  | — |  |  | — |  |  | — |  |  | 2.3 |  |  | — |
Net periodic benefit cost | $ | 1.8 |  |  | $ | 0.9 |  |  | $ | (1.0) |  |  | $ | (1.3) |  |  | $ | 0.8 |  |  | $ | (0.4) |
| Pension benefits |  |  |  | Other retirement benefits |  |  |  | Total |  |
($ in millions) | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
U.S. plans | $ | 1.1 |  |  | $ | (0.1) |  |  | $ | (1.0) |  |  | $ | (1.3) |  |  | $ | 0.1 |  |  | $ | (1.4) |
International plans | 0.7 |  |  | 1.0 |  |  | — |  |  | — |  |  | 0.7 |  |  | 1.0 |
Net periodic benefit cost | $ | 1.8 |  |  | $ | 0.9 |  |  | $ | (1.0) |  |  | $ | (1.3) |  |  | $ | 0.8 |  |  | $ | (0.4) |
During the three and six months ended June 30, 2020, we recorded a $0.9 million and $2.3 million pension settlement charge, respectively, within other nonoperating (income) expense, 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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