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Fair Value of Financial Instruments - Changes in Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried at Fair Value and Still Held (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | $ 4,136 | $ 1,376 | $ 3,045
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Realized gain (loss) | Realized gain (loss) | Realized gain (loss)
Trading securities |  |  |
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | $ 0 | $ 8 | $ (81)
Equity securities |  |  |
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | (2) | (16) | 56
Mortgage loans on real estate |  |  |
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | 0 | (8) | (20)
Derivative liabilities |  |  |
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | (121) | 1 | 2
MRBs |  |  |
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | 2,643 | 2,200 | 3,183
Reinsurance-related embedded derivatives |  |  |
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | 555 | (789) | 0
Indexed annuity ceded embedded derivatives |  |  |
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items] |  |  |
Changes in unrealized gains (losses) included in net income | $ 1,061 | $ (20) | $ (95)

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- Definition Fair Value Assets And Liabilities Measured On Recurring Basis Level 3 Activity [Line Items] + References No definition available. + Details
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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 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: 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 of income or comprehensive income 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 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: 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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