Benefit Plans - Estimated future benefit payments (Detail) $ in Millions	Dec. 31, 2023 USD ($)
Pension plans
Defined Benefit Plan Disclosure [Line Items]
2024	$ 8.4
2025	8.3
2026	8.1
2027	9.1
2028	9.0
2029 - 2033	39.0
Other post-retirement plans
Defined Benefit Plan Disclosure [Line Items]
2024	1.1
2025	1.0
2026	0.9
2027	0.9
2028	0.8
2029 - 2033	$ 2.8

Defined Benefit Plan, Expected Future Benefit Payments after Year Five

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of benefit for defined benefit plan expected to be paid in next 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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- Definition

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

+ References

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- Definition

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

+ References

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- Definition

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

+ References

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- Definition

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

+ References

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