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Benefit Plans, Net Periodic Benefit Cost (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Pension Benefits [Member] |  |  |
Components of Net Periodic Benefit Cost [Abstract] |  |  |
Service cost | $ 4.2 | $ 4.5 | $ 6.6
Interest cost | 16.0 | 16.0 | 11.0
Expected return on plan assets | (19.8) | (17.8) | (21.5)
Recognized net actuarial (gain) loss | 1.5 | 2.9 | 5.3
Settlement/curtailment (gain) loss | 0.0 | 0.1 | 3.5
Net periodic benefit cost | 1.9 | 5.7 | 4.9
Post-Retirement Benefits [Member] |  |  |
Components of Net Periodic Benefit Cost [Abstract] |  |  |
Service cost | 0.0 | 0.0 | 0.0
Interest cost | 0.1 | 0.1 | 0.0
Expected return on plan assets | 0.0 | 0.0 | 0.0
Recognized net actuarial (gain) loss | (0.4) | (0.5) | (0.4)
Settlement/curtailment (gain) loss | 0.0 | 0.0 | 0.0
Net periodic benefit cost | $ (0.3) | $ (0.4) | $ (0.4)

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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 -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480535/715-20-45-3A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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