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Variable Interest Entities - Summary of Fair Value of Fixed Income Securities, by Asset-Type, Held by Consolidated Variable Interest Entities (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Variable Interest Entities [Line Items] |  |
Variable Interest Entity Nonconsolidated Carrying Amount Insurance Assets | $ 351 | $ 490
Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities | 836 | 840
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount | 20,861 | 21,639
Variable Interest Entity Nonconsolidated Carrying Amount Derivative Net Assets Or Liabilities | 0 |
Fixed income securities, amortized cost | 2,197 | 2,041
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 40 | 31
Variable Interest Entity [Member] |  |
Variable Interest Entities [Line Items] |  |
Variable Interest Entity Nonconsolidated Carrying Amount Derivative Net Assets Or Liabilities |  | 1
Corporate Obligations [Member] |  |
Variable Interest Entities [Line Items] |  |
Fixed income securities, amortized cost | 785 | 659
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 4 | 1
Municipal Bonds [Member] |  |
Variable Interest Entities [Line Items] |  |
Fixed income securities, amortized cost | 72 | 44
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1 | 0
Municipal Bonds [Member] | Variable Interest Entity [Member] |  |
Variable Interest Entities [Line Items] |  |
Fixed income securities, amortized cost | 88 | 99
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | $ 7 | $ 1

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- Definition The net carrying amount of derivative assets or liabilities in the reporting entity's statement of financial position that relate to the entity's variable interests in Variable Interest Entities (VIEs) where the VIEs are not consolidated. + References No definition available. + Details
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- Definition The carrying amount of insurance assets in the reporting entity's statement of financial position that relate to the entity's variable interests in Variable Interest Entities (VIEs) where the VIEs are not consolidated. + References No definition available. + Details
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- Definition The carrying amount of insurance liabilities in the reporting entity's statement of financial position that relate to the entity's variable interests in Variable Interest Entities (VIEs) where the VIEs are not consolidated. + References No definition available. + Details
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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-4 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-6 + Details
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