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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Guarantees	$ 6.8	$ 6.2
Minimum [Member]
Other Commitments [Line Items]
Fixed maturity guarantee remaining term	2 months
Maximum [Member]
Other Commitments [Line Items]
Fixed maturity guarantee remaining term	8 years
Additional Cost To Complete Wip [Member]
Other Commitments [Line Items]
Capital commitments	$ 35.4	33.7
Additional Cost To Complete Wip [Member] | Computer Software, Intangible Asset [Member]
Other Commitments [Line Items]
Capital commitments	$ 29.5	$ 8.9

X

- Definition

Guarantor obligations, fixed maturity remaining term.

+ References

No definition available.

+ Details

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X

- Definition

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

+ Details

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X

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

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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.

+ Details

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