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Gains and Losses Included in Net (Income) from Liabilities Measured at Fair Value (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total realized and unrealized (gains) losses included in net (income), liabilities | $ 10 | $ 9 | $ 18 | $ 6
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Total (gains) losses included in net (income) attributable to liabilities still held, liabilities | $ 10 | $ 6 | $ 18 | $ 3
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Net Investment Income |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total realized and unrealized (gains) losses included in net (income), liabilities | $ 0 | $ 0 | $ 0 | $ 0
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Total (gains) losses included in net (income) attributable to liabilities still held, liabilities | $ 0 | $ 0 | $ 0 | $ 0
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Net investment (gains) losses |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |  |  |
Total realized and unrealized (gains) losses included in net (income), liabilities | $ 10 | $ 9 | $ 18 | $ 6
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
Total (gains) losses included in net (income) attributable to liabilities still held, liabilities | $ 10 | $ 6 | $ 18 | $ 3
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest

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- Definition Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Indicates line item in statement in which net income is reported that includes unrealized gain (loss) from liability measured at fair value using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Indicates line item in statement in which net income is reported that includes gain (loss) from liability measured at fair value using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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