Market Risk Benefits - Schedule of Market Risk Benefit, Activity (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Market Risk Benefit [Line Items] | |||
| Market risk benefit - (assets) | $ (8,489) | $ (7,867) | |
| Market risk benefit - liabilities | 2,920 | 3,754 | |
| Market risk benefit - net (asset) liability | (5,569) | (4,113) | |
| Variable Annuity | |||
| Market Risk Benefit [Line Items] | |||
| Market risk benefit - (assets) | (8,485) | (7,863) | |
| Market risk benefit - liabilities | 2,699 | 3,598 | |
| Market risk benefit - net (asset) liability | (5,786) | (4,265) | $ (5,176) |
| Other Product Lines | |||
| Market Risk Benefit [Line Items] | |||
| Market risk benefit - (assets) | (4) | (4) | |
| Market risk benefit - liabilities | 221 | 156 | |
| Market risk benefit - net (asset) liability | $ 217 | $ 152 |
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- Definition Amount, before effect of reinsurance and after accumulated increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of asset position for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of liability position for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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