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v3.23.1

Defined contribution and defined benefit retirement (Tables) | 3 Months Ended
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Mar. 31, 2023
Defined Benefit Pension Plans |
Components of Net Periodic Defined Benefit Cost | The components of our net periodic defined benefit pension cost are presented in the table below. ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended
​ | ​ | March 31,
​ |  | 2022 |  | 2023
​ | ​ | (In millions)
Service cost | ​ | $ | 3.0 | ​ | $ | 1.6
Interest cost | ​ | ​ | 3.2 | ​ | ​ | 5.6
Expected return on plan assets | ​ |  | (3.5) | ​ |  | (5.2)
Recognized net actuarial losses | ​ |  | 3.8 | ​ |  | .9
Total | ​ | $ | 6.5 | ​ | $ | 2.9
​

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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 https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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