Market Risk Benefits (Instrument Specific Credit Risk) (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Market Risk Benefit [Line Items] | ||||
| Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk | $ (234) | $ (230) | ||
| Market Risk Benefit, Asset, Amount | [1] | 15 | 13 | |
| Market Risk Benefit, Liability, Amount | 249 | 243 | ||
| Insurance, Other | Americas [Member] | US Financial Solutions Segment | ||||
| Market Risk Benefit [Line Items] | ||||
| Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk | (234) | (230) | ||
| Market Risk Benefit, Asset, Amount | [1] | 15 | 13 | |
| Market Risk Benefit, Liability, Amount | $ 249 | $ 243 | ||
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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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