Market Risk Benefits - Schedule of market risk benefits (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Market Risk Benefit [Line Items] | ||
| Asset | $ 2,628 | $ 1,151 |
| Liability | 7,333 | 6,339 |
| Net | 4,705 | 5,188 |
| Individual Retirement | ||
| Market Risk Benefit [Line Items] | ||
| Asset | 0 | 0 |
| Liability | 5,136 | 4,152 |
| Net | 5,136 | 4,152 |
| Group Retirement | ||
| Market Risk Benefit [Line Items] | ||
| Asset | 216 | 192 |
| Liability | 583 | 524 |
| Net | 367 | 332 |
| Corporate & Other | ||
| Market Risk Benefit [Line Items] | ||
| Asset | 2,412 | 959 |
| Liability | 1,614 | 1,663 |
| Net | $ (798) | $ 704 |
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- Definition Market Risk Benefit, Assets, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change No definition available.
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- Definition Market Risk Benefit, Liabilities, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change No definition available.
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- Definition Amount, after effect of reinsurance and cumulative 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/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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