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v3.23.1

Reserve for Future Policy Benefits and Contractholder Funds - Schedule of account values by comparison of current crediting rate to guaranteed minimum crediting rate (Details) $ in Millions | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($)
--- | --- | ---
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 878 | $ 891
Less than 3% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 0 | $ 0
Less than 3% | Maximum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 3.00% | 3.00%
3.00% - 3.49% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 20 | $ 6
3.00% - 3.49% | Minimum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 3.00% | 3.00%
3.00% - 3.49% | Maximum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 3.49% | 3.49%
3.50% - 3.99% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 11 | $ 12
3.50% - 3.99% | Minimum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 3.50% | 3.50%
3.50% - 3.99% | Maximum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 3.99% | 3.99%
4.00% - 4.49% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 431 | $ 438
4.00% - 4.49% | Minimum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 4.00% | 4.00%
4.00% - 4.49% | Maximum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 4.49% | 4.49%
4.50% - 4.99% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 266 | $ 272
4.50% - 4.99% | Minimum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 4.50% | 4.50%
4.50% - 4.99% | Maximum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 4.99% | 4.99%
5% or greater |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 69 | $ 71
5% or greater | Minimum |  |
Policyholder Account Balance [Line Items] |  |
Range of guaranteed minimum crediting rates | 5.00% | 5.00%
Non-account balances |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 81 | $ 92
At guaranteed minimum |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 777 | 793
At guaranteed minimum | Less than 3% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 0 | 0
At guaranteed minimum | 3.00% - 3.49% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 0 | 0
At guaranteed minimum | 3.50% - 3.99% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 11 | 12
At guaranteed minimum | 4.00% - 4.49% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 431 | 438
At guaranteed minimum | 4.50% - 4.99% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 266 | 272
At guaranteed minimum | 5% or greater |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 69 | 71
At guaranteed minimum | Non-account balances |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates |  |
1-50 basis points above |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 20 | 6
1-50 basis points above | Minimum |  |
Policyholder Account Balance [Line Items] |  |
Policyholder account balance above guaranteed minimum crediting rate | 0.0001 |
1-50 basis points above | Maximum |  |
Policyholder Account Balance [Line Items] |  |
Policyholder account balance above guaranteed minimum crediting rate | 0.0050 |
1-50 basis points above | Less than 3% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | $ 0 | 0
1-50 basis points above | 3.00% - 3.49% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 20 | 6
1-50 basis points above | 3.50% - 3.99% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 0 | 0
1-50 basis points above | 4.00% - 4.49% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 0 | 0
1-50 basis points above | 4.50% - 4.99% |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 0 | 0
1-50 basis points above | 5% or greater |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates | 0 | 0
1-50 basis points above | Non-account balances |  |
Policyholder Account Balance [Line Items] |  |
Account values with crediting rates |  |

X
- Definition Value above guaranteed minimum crediting rate on policyholder account balance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 29F -URI https://asc.fasb.org/extlink&oid=126561865&loc=SL117819544-158441 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 7A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439 + Details
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- Definition Guaranteed minimum crediting rate on policyholder account balance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 29F -URI https://asc.fasb.org/extlink&oid=126561865&loc=SL117819544-158441 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 7A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439 + Details
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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. + References No definition available. + Details
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- Definition Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 7A -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 7A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 7A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124506351&loc=SL117782755-158439 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 29F -URI https://asc.fasb.org/extlink&oid=126561865&loc=SL117819544-158441 + Details
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