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Benefit Plans, Net Periodic Benefit Cost (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pension Benefits [Member] |  |  |
Components of Net Periodic Benefit Cost [Abstract] |  |  |
Service cost | $ 6.6 | $ 7.7 | $ 7.7
Interest cost | 11.0 | 7.9 | 10.5
Expected return on plan assets | (21.5) | (22.0) | (20.1)
Recognized net actuarial (gain) loss | 5.3 | 12.1 | 13.9
Settlement/curtailment (gain) loss | 3.5 | 3.4 | 6.4
Net periodic benefit cost | 4.9 | 9.1 | 18.4
Post-Retirement Benefits [Member] |  |  |
Components of Net Periodic Benefit Cost [Abstract] |  |  |
Service cost | 0.0 | 0.1 | 0.2
Interest cost | 0.0 | 0.1 | 0.2
Expected return on plan assets | 0.0 | 0.0 | 0.0
Recognized net actuarial (gain) loss | (0.4) | (0.8) | (0.9)
Settlement/curtailment (gain) loss | 0.0 | (1.6) | 0.0
Net periodic benefit cost | $ (0.4) | $ (2.2) | $ (0.5)

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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