Pension and Postretirement Plans - Expected Future Benefit Payments (Details) $ in Millions	Dec. 31, 2024 USD ($)
Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract]
2025	$ (0.1)
2026	(0.1)
2027	(0.1)
2028	(0.1)
2029	0.0
Years 2030 - 2034	(0.1)
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2025	37.9
2026	33.0
2027	31.1
2028	29.3
2029	26.1
Years 2030 - 2034	114.9
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2025	7.8
2026	7.7
2027	7.7
2028	7.5
2029	7.4
Years 2030 - 2034	$ 34.9

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- Definition

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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Amount of prescription drug subsidy receipt expected after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480266/715-60-50-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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Amount of prescription drug subsidy receipt expected in next fiscal year following current fiscal year.

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Amount of prescription drug subsidy receipt expected in fifth fiscal year following current fiscal year.

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Amount of prescription drug subsidy receipt expected in fourth fiscal year following current fiscal year.

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Amount of prescription drug subsidy receipt expected in third fiscal year following current fiscal year.

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Amount of prescription drug subsidy receipt expected in second fiscal year following current fiscal year.

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