Reinsurance - Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets
Premiums receivable, direct	$ 205	$ 193
Premiums Receivable, assumed	10	9
Premiums receivable, ceded	(238)	(219)
Premiums receivable, Net of reinsurance	(23)	(17)
Reinsurance recoverable, net of allowance for credit losses, ceded	11,307	11,999
Reinsurance recoverable, net of allowance for credit losses, net	11,307	11,999
Total assets, direct	205	193
Total assets, assumed	10	9
Total assets, ceded	11,069	11,780
Premium receivable and reinsurance recoverable (net of allowance for credit losses of $16 and $28 as of 2024 and 2023, respectively)	11,284	11,982
Liabilities
Future policy benefits and contract owner account balances, direct	45,540	47,781
Future policy benefits and contract owner account balances, assumed	896	953
Future policy benefits and contract owner account balances, net	46,436	48,734
Liability for funds withheld under reinsurance agreements, direct	103	103
Liability for funds withheld under reinsurance agreements, net	103	103
Total liabilities, direct	45,643	47,884
Total liabilities, assumed	896	953
Total liabilities, net	$ 46,539	$ 48,837