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v3.25.1

Market Risk Benefits - Net Asset (Liability) Balances and Changes in Valuation of the MRBs for Individual Variable Annuities (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Net asset (liability) balances and the changes in the valuation of the MRBs |  |
Balance at beginning of period, market risk benefits | $ 137.4 |
Balance at end of period, market risk benefits | 78.3 | $ 137.4
Retirement and Income Solutions | Individual variable annuities |  |
Net asset (liability) balances and the changes in the valuation of the MRBs |  |
Balance at beginning of period, market risk benefits | 137.4 | 41.5
Effect of changes in nonperformance risk at beginning of period | 19.0 | 7.7
Adjusted balance at beginning of period, market risk benefits | 156.4 | 49.2
Interest accrual and expected policyholder behavior | (14.8) | (66.8)
Benefit payments |  | 0.6
Changes in interest rates | (21.5) | 100.4
Changes in equity markets | (17.8) | 92.4
Changes in equity index volatility | (5.9) | 12.0
Actual policyholder behavior different from expected behavior | (1.8) | (12.7)
Changes in future expected policyholder behavior |  | (20.2)
Changes in other future expected assumptions |  | 1.5
Adjusted balance at end of period, market risk benefits | 94.6 | 156.4
Effect of changes in nonperformance risk at end of period | 16.3 | 19.0
Balance at end of period, market risk benefits | $ 78.3 | $ 137.4
Weighted-average attained age of policyholders (years) | 67 years 3 months 18 days | 67 years 4 months 24 days
Net amount at risk | $ 132.4 | $ 46.8

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) (AOCI) from (increase) decrease in instrument-specific credit risk on contract or contract feature in long-duration contract issued by insurance entity protecting contract holder from other-than-nominal capital market risk and exposing insurance entity to other-than-nominal capital market risk. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-7B Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29G -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-29G Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480016/944-40-65-2 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 13K -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-13K + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480016/944-40-65-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29G -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-29G Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-7B Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480112/944-40-45-3 + Details
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