XML 40 R31.htm IDEA: XBRL DOCUMENT
v3.22.1

PENSION AND POST-RETIREMENT PLANS (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2022
PENSION AND POST-RETIREMENT PLANS |
Components of net periodic benefit cost (benefit) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension Benefits | ​ | Post-retirement Benefits
​ | ​ | Three Months Ended March 31, | ​ | Three Months Ended March 31,
(In millions) |  | 2022 |  | 2021 |  | 2022 |  | 2021
Components of net periodic benefit cost (benefit): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Service cost | ​ | $ | 1.2 | ​ | $ | 1.2 | ​ | $ | 0.2 | ​ | $ | 0.2
Interest cost | ​ |  | 1.7 | ​ |  | 1.5 | ​ |  | 0.2 | ​ |  | 0.2
Expected return on plan assets | ​ |  | (3.9) | ​ |  | (3.6) | ​ |  | — | ​ |  | —
Amortization of net loss | ​ |  | 0.8 | ​ |  | 1.3 | ​ |  | 0.2 | ​ |  | 0.3
Amortization of prior service credit | ​ |  | (0.3) | ​ |  | (0.6) | ​ |  | (0.9) | ​ |  | (0.9)
Net periodic benefit cost (benefit) | ​ | $ | (0.5) | ​ | $ | (0.2) | ​ | $ | (0.3) | ​ | $ | (0.2)

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 -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
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration