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Future Policy Benefits - Summary of Weighted Average Interest and Discount Rates (Detail)	Jun. 30, 2024	Dec. 31, 2023
Long-term Care Insurance
Disclosure In Tabular Form Of Weighted Average Interest And Discount Rates For The Liability For Future Policy Benefits [Line Items]
Interest accretion (locked-in) rate	5.70%	5.80%
Current discount rate	5.60%	5.10%
Life Insurance
Disclosure In Tabular Form Of Weighted Average Interest And Discount Rates For The Liability For Future Policy Benefits [Line Items]
Interest accretion (locked-in) rate	5.80%	5.80%
Current discount rate	5.30%	4.80%
Fixed annuities
Disclosure In Tabular Form Of Weighted Average Interest And Discount Rates For The Liability For Future Policy Benefits [Line Items]
Interest accretion (locked-in) rate	6.80%	6.70%
Current discount rate	5.60%	5.00%

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- Definition

Disclosure in tabular form of weighted average interest and discount rates for the liability for future policy benefits [Line items].

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- Definition

Current weighted-average discount rate used to measure liability for future policy benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 29E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480046/944-40-55-29E

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)(6)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-6

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Original weighted-average discount rate at contract issue date used to measure liability for future policy benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 29E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480046/944-40-55-29E

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-Paragraph 6
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-6

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