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Retirement Plans and Postretirement Benefits - (Tables) | 9 Months Ended
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Sep. 30, 2022
Retirement Benefits [Abstract] |
Components of Net Periodic Cost of Pension and Other Postretirement Employee Benefit Plans | The following table details the components of net periodic cost of our company-sponsored pension and other postretirement employee benefit plans for the periods presented:
| Quarter Ended September 30, |  | Nine Months Ended September 30,
Pension Benefit Plans | 2022 | 2021 |  | 2022 | 2021
Service cost | $ | 0.5 |  | $ | 0.4 |  |  | $ | 1.6 |  | $ | 1.4 |
Interest cost | 2.2 |  | 2.1 |  |  | 6.6 |  | 6.3 |
Expected return on plan assets | (2.8) |  | (2.6) |  |  | (8.5) |  | (7.9) |
Amortization of actuarial loss | 1.5 |  | 2.5 |  |  | 4.6 |  | 7.7 |
Net periodic cost | $ | 1.5 |  | $ | 2.4 |  |  | $ | 4.4 |  | $ | 7.4 |
|  |  | Quarter Ended September 30, |  | Nine Months Ended September 30,
Other Postretirement Employee Benefit Plans |  |  |  |  | 2022 | 2021 |  | 2022 | 2021
Service cost |  |  |  |  | $ | 0.1 |  | $ | 0.2 |  |  | $ | 0.3 |  | $ | 0.3 |
Interest cost |  |  |  |  | 0.5 |  | 0.6 |  |  | 1.5 |  | 1.5 |
Amortization of actuarial loss |  |  |  |  | — |  | 0.2 |  |  | — |  | 0.2 |
Net periodic cost |  |  |  |  | $ | 0.6 |  | $ | 1.0 |  |  | $ | 1.8 |  | $ | 2.0 |

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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=123447040&loc=d3e1928-114920 + Details
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