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Additional Insurance Liabilities - Summary of Weighted-Average Anterest rates for the Liability for Additional Insurance Liabilities (Detail) | Jun. 30, 2024 | Dec. 31, 2023
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Schedule of Weighted Average Interest Rates for the Liability for Additional Insurance Liabilities [Abstract] |  |  |
Interest accretion rate | [1] | 3.40% | 3.20%
Projected crediting rate | [2] | 3.90% | 3.80%
[1] | The interest accretion rate is determined by using the weighted-average policyholder crediting rates for the underlying policies over the period in-force, and based on the adjusted beginning balance, is used to measure the amount of interest accretion.
[2] | The projected crediting rate is determined by using a future crediting rate curve that utilizes a portfolio approach reflecting anticipated reinvestment activity and runoff of existing assets over the projection period. The projected crediting rate is used to discount future assessments and excess benefits.

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- Definition Schedule of weighted- average interest rates for the liability for additional insurance liabilities. + References No definition available. + Details
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- Definition Current weighted-average discount rate used to measure present value of total expected payment to policyholder in excess of present value of total expected assessment. Excludes benefit classified as market risk benefit or under provisions of Topic 815 on derivative and hedging. + References Reference 1: 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 + Details
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- Definition Original weighted-average discount rate at contract issue date used to measure present value of total expected payment to policyholder in excess of present value of total expected assessment. Excludes benefit classified as market risk benefit or under provisions of Topic 815 on derivative and hedging. + References Reference 1: 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 + Details
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