Contingencies - Summary of Notes Receivable from Insurance Companies and Activity During the Year (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]
Balance beginning of period	$ 44.6	$ 48.5
Divestiture of MSA LLC	(44.6)	0.0
Additions	0.0	1.2
Collections	0.0	(5.1)
Balance end of period	$ 0.0	$ 44.6

Notes, Loans And Financing Receivable, Insurance Companies, Divestiture Of Business

No definition available.

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Notes, Loans and Financing Receivable, Insurance Companies, Additions

No definition available.

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Notes, Loans and Financing Receivable, Insurance Companies, Proceeds

No definition available.

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Notes, Loans and Financing Receivable, Net, Insurance Companies

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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