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Future Policy Benefits - Schedule of Liability For Future Policy Benefit Expected Future Policy Benefit Undiscounted (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Sep. 30, 2024
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Traditional Life |  |
Undiscounted |  |
Expected future benefit payments | $ 2,569 | $ 2,843
Expected future gross premiums | 875 | 978
Discounted |  |
Expected future benefit payments | 1,892 | 2,073
Expected future gross premiums | 650 | 728
Immediate annuities |  |
Undiscounted |  |
Expected future benefit payments | 3,125 | 3,212
Expected future gross premiums | 0 | 0
Discounted |  |
Expected future benefit payments | 1,304 | 1,392
Expected future gross premiums | 0 | 0
PRT |  |
Undiscounted |  |
Expected future benefit payments | 11,809 | 8,449
Expected future gross premiums | 0 | 0
Discounted |  |
Expected future benefit payments | 7,363 | 5,470
Expected future gross premiums | $ 0 | $ 0

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- Definition Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted + References No definition available. + Details
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- Definition Liability For Future Policy Benefit, Expected Future Policy Benefit, Discounted, Before Reinsurance + References No definition available. + Details
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- Definition Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted + References No definition available. + Details
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- Definition Amount, before effect of reinsurance, of discounted balance for expected future gross premium component of liability for future policy benefit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 + Details
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- Definition Amount, before effect of reinsurance, of undiscounted balance for expected future gross premium component of liability for future policy benefit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-29E + Details
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- Definition Amount, before effect of reinsurance, of undiscounted balance for expected future policy benefit and expense component of liability for future policy benefit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-6 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-29E + Details
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- Details
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- Details
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