Separate Account Balances - Benefits and Protection (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Changes in separate account liabilities | ||
| Balance at beginning of period | $ 193,622.6 | |
| Balance at end of period | 202,396.0 | $ 193,622.6 |
| Benefits and Protection | Life Insurance | Universal life | ||
| Changes in separate account liabilities | ||
| Balance at beginning of period | 7,807.9 | 6,806.7 |
| Premiums and deposits | 291.5 | 572.7 |
| Policy charges | (69.7) | (135.4) |
| Surrenders, withdrawals and benefit payments | (243.8) | (374.4) |
| Investment performance | 602.5 | 938.5 |
| Net transfers (to) from general account | 22.7 | (0.2) |
| Balance at end of period | 8,411.1 | 7,807.9 |
| Cash surrender value | $ 8,487.4 | $ 7,873.6 |
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- Definition Amount of decrease in separate account liability from contract redemption and withdrawal of funds and cash outflow to separate account policyholder from benefit payment. No definition available.
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- Definition Amount of transfer to (from) liability for separate account (to) from general account. No definition available.
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- Definition Amount of separate account liability payable to policyholder upon surrender of contract before maturity. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase (decrease) in separate account liability from performance of investment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of decrease in separate account liability from policy charge. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash inflow to separate account liability from premium and deposit from cash received. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of liability for variable contract in which all or portion of contract holder's funds is allocated to specific separate account and supported by assets held in separate account. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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