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Reinsurance - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 01, 2024 | Dec. 31, 2024 | Dec. 16, 2024 | Jul. 01, 2024 | Jun. 30, 2024
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance recoverable, allowance for credit loss |  | $ 298 |  |  |
Reinsurance, risk charge fees |  | 13 |  |  |
Subsidiary of American National |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Funds withheld for reinsurance liabilities |  | $ 1,300 | $ 1,300 |  |
AEL Re Bermuda Ltd |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance agreement, liabilities recaptured, percentage | 100.00% |  |  |  |
North End Re, Reinsurance Agreement, In Force as of July 1, 2021 |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance agreement, modified coinsurance basis, percentage |  | 70.00% |  |  |
Reinsurance agreement, coinsurance basis, percentage |  | 30.00% |  |  |
Reinsurance agreement, liabilities recaptured, percentage | 100.00% |  |  |  |
Reinsurance agreement, net gain (loss) on assets and liabilities written-off | $ 762 |  |  |  |
Reinsurance Group of America Inc. (RGA) |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Ceded premiums payable |  |  |  | $ 3,400 |
Deferred gain on reinsurance agreement |  | $ 1,600 |  |  |
Amortization of deferred gain on reinsurance agreement |  | $ 35 |  |  |
Reinsurance Group of America Inc. (RGA) | American National Life Insurance Company, American National Life Insurance Company of Texas, and Garden State Life Insurance Company |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance agreement, ceded risk, percentage |  |  |  | 100.00% |
Reinsurance Group of America Inc. (RGA) | American National Life Insurance Company of New York |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance agreement, ceded risk, percentage |  |  |  | 80.00% |
Freestone Re Ltd. (Freestone) | AEILIC |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance agreement, quota share, fixed indexed and payout annuities, percentage | 50.00% |  |  |  |
Reinsurance agreement, quota share, fixed rate and fixed indexed annuities, percentage | 70.00% |  |  |  |
Freestone Re Ltd. (Freestone) | Eagle Life Insurance Company |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance agreement, quota share, fixed indexed and payout annuities, percentage | 50.00% |  |  |  |
Reinsurance agreement, quota share, fixed rate and fixed indexed annuities, percentage | 70.00% |  |  |  |
Freestone Re Ltd. (Freestone) | American National Insurance Company (ANICO) |  |  |  |  |
Effects of Reinsurance [Line Items] |  |  |  |  |
Reinsurance agreement, ceded risk, in-force and future flow business |  |  |  |  | 80.00%
Reinsurance agreement, ceded risk, in-force and future flow single premium immediate annuity business |  |  |  |  | 70.00%
Reinsurance agreement, ceded risk, fixed deferred and equity-Indexed annuity business, issued |  |  |  |  | 100.00%
Reinsurance agreement, ceded risk, fixed deferred and equity-indexed annuity business |  |  |  |  | 70.00%

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