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v3.25.1

Investments - Narrative (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 USD ($) loan | Mar. 31, 2024 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2024 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Investment, non-income producing, greater than twelve months | $ 33,000,000 |  |  | $ 32,000,000
Accrued interest receivable | 484,000,000 |  |  | 476,000,000
FHLB collateral pledged | 4,740,000,000 |  |  | 4,289,000,000
Fixed maturity securities, available-for-sale securities, allowance for credit losses | 85,000,000 |  |  | 67,000,000
Allowance for credit loss for securities in an unrealized loss position | $ 0 |  |  |
Commercial mortgage loans, percentage of investments | 4.00% |  |  |
DSC ratio, amortization period | 25 years |  |  |
Amortized cost of loans on non-accrual | $ 82,000,000 |  |  | 94,000,000
Loans in process of foreclosure | 77,000,000 |  |  | 81,000,000
Gross investment income | 824,000,000 | $ 780,000,000 |  |
Reinsurance agreement, recognized gains (losses) | (42,000,000) | (19,000,000) |  |
Funds Withheld, Reinsurance Agreements |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross investment income | $ 184,000,000 | $ 127,000,000 |  |
United States |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Residential mortgage loans, location percentage | 100.00% |  |  |
Commercial Mortgage |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Mortgage loans delinquent in principal or interest | loan | 1 |  |  |
Amortized cost of loans on non-accrual | $ 10,000,000 |  |  | 9,000,000
Interest receivable | $ 9,000,000 |  |  | $ 8,000,000
Commercial Mortgage | Mortgage loans |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Allowance for expected credit loss, probability of loss/default model, projected loss, using reasonable forecast period | 2 years |  |  |
Allowance for credit loss, probability of loss/default, using market historical loss experience, period | 3 years |  |  |
Residential Mortgage |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Residential mortgage loans, percentage of total investments | 6.00% |  |  | 5.00%
Charge offs | $ 0 |  | $ 0 |
Amortized cost of loans on non-accrual | 72,000,000 |  |  | $ 85,000,000
Interest receivable | $ 31,000,000 |  |  | 28,000,000
Residential Mortgage | Mortgage loans |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Allowance for expected credit loss, probability of loss/default model, projected loss, using reasonable forecast period | 2 years |  |  |
Allowance for credit loss, probability of loss/default, using market historical loss experience, period | 3 years |  |  |
Fixed maturity securities, available-for-sale |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Assets held by insurance regulators | $ 149,000,000 |  |  | $ 997,000,000

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