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Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2021
Related Party Transaction [Line Items]
Total investments	$ 84,848		$ 84,848		$ 80,755
Cash and cash equivalents	$ 12,104		$ 12,104		11,330
AEILIC | Freestone Re Ltd. (Freestone)
Related Party Transaction [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%
American National Insurance Company (ANICO) | Freestone Re Ltd. (Freestone)
Related Party Transaction [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%		70.00%
Related Party
Related Party Transaction [Line Items]
Payments to acquire investments			$ 2,100	$ 1,200
Total investments	$ 10,700		$ 10,700		9,600
Related Party | North End Re
Related Party Transaction [Line Items]
Reinsurance, modified coinsurance basis	70.00%		70.00%
Reinsurance, coinsurance basis	30.00%		30.00%
Related Party | Brookfield Treasury Management Inc
Related Party Transaction [Line Items]
Cash and cash equivalents	$ 260		$ 260		254
Interest income	3	$ 2	6	2
Related Party | Investment Management Fees
Related Party Transaction [Line Items]
Related party agreements and transactions	52	$ 32	99	$ 45
Related Party | ANAT and BAMR US Holdings LLC Deposit Agreement
Related Party Transaction [Line Items]
Cash and cash equivalents	$ 274		$ 274		$ 464

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