XML 50 R40.htm IDEA: XBRL DOCUMENT
v3.24.3

Retirement Plans and Postretirement Benefits - (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2024
Retirement Benefits [Abstract] |
Components of Net Periodic Cost of Pension and Other Postretirement Employee Benefit Plans |
| Quarter Ended September 30, |  | Nine Months Ended September 30, |  |
Pension Benefit Plans | 2024 | 2023 |  | 2024 | 2023 |  |  |
Service cost | $ | 0.6 |  | $ | 0.9 |  |  | $ | 1.9 |  | $ | 2.6 |  |  |  |
Interest cost | 3.0 |  | 3.1 |  |  | 8.9 |  | 9.3 |  |  |  |
Expected return on plan assets | (3.9) |  | (3.8) |  |  | (11.8) |  | (11.4) |  |  |  |
Net periodic cost | $ | (0.3) |  | $ | 0.2 |  |  | $ | (0.9) |  | $ | 0.6 |  |  |  |
|  |  | Quarter Ended September 30, |  | Nine Months Ended September 30, |  |
Other Postretirement Employee Benefit Plans |  |  |  |  | 2024 | 2023 |  | 2024 | 2023 |  |  |
Service cost |  |  |  |  | $ | 0.1 |  | $ | — |  |  | $ | 0.2 |  | $ | 0.1 |  |  |  |
Interest cost |  |  |  |  | 0.7 |  | 0.7 |  |  | 2.0 |  | 2.1 |  |  |  |
Amortization of actuarial gain |  |  |  |  | (0.1) |  | (0.1) |  |  | (0.2) |  | (0.4) |  |  |  |
Net periodic cost |  |  |  |  | $ | 0.6 |  | $ | 0.6 |  |  | $ | 2.0 |  | $ | 1.8 |  |  |  |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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 -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration