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Investments - Schedule of Changes in Unrealized Appreciation (Depreciation) of Available for Sale Securities and Other Investments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items] |  |  |
Increase (decrease) in unrealized appreciation (depreciation) of investments | $ (1,456) | $ 8,440 | $ (47,766)
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] |  |  |
Net gains recognized during the period on equity securities and other investments | 845 | 302 |
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period | 506 | 70 |
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date | 339 | 232 |
Corebridge Financial Inc |  |  |
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] |  |  |
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date | 439 |  |
Continuing Operations, Excluding Held-For-Sale |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Increase (decrease) in unrealized appreciation (depreciation) of investments | 692 | 2,463 |
Fixed maturity securities | Continuing Operations, Excluding Held-For-Sale |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Increase (decrease) in unrealized appreciation (depreciation) of investments | 692 | 2,463 |
Other investments | Continuing Operations, Excluding Held-For-Sale |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Increase (decrease) in unrealized appreciation (depreciation) of investments | 0 | 0 |
Equities |  |  |
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] |  |  |
Net gains recognized during the period on equity securities and other investments | 149 | 53 |
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period | 45 | 90 |
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date | 104 | (37) |
Other invested assets |  |  |
Equity Securities, FV-NI, Unrealized Gain (Loss) [Abstract] |  |  |
Net gains recognized during the period on equity securities and other investments | 696 | 249 |
Less: Net gains (losses) recognized during the period on equity securities and other investments sold during the period | 461 | (20) |
Unrealized gains (losses) recognized during the reporting period on equity securities and other investments still held at the reporting date | $ 235 | $ 269 |

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- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-4 + Details
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