Transactions with Affiliates - Balance Sheet Transactions with Affiliates (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Fixed maturity available-for-sale securities, at fair value	$ 81,900	$ 82,300
Policy loans	2,465	2,463
Deferred acquisition costs, value of business acquired and deferred sales inducements	12,426	12,418
Accrued investment income	993	982
Reinsurance recoverables, net of allowance for credit losses	48,943	45,110
Deposit assets, net of allowance for credit losses	30,537	21,514
Other assets	10,192	10,139
Future contract benefits	40,002	40,174
Policyholder account balances	125,818	120,316
Short-term debt	24	840
Long-term debt	2,173	2,195
Funds withheld reinsurance liabilities	26,810	13,628
Other liabilities	13,977	12,438
Accumulated other comprehensive income (loss)	(2,330)	(1,585)
Related Party
Related Party Transaction [Line Items]
Fixed maturity available-for-sale securities, at fair value	905	1,063
Policy loans	1	1
Deferred acquisition costs, value of business acquired and deferred sales inducements	(251)	(131)
Accrued investment income	6	16
Reinsurance recoverables, net of allowance for credit losses	20,468	15,563
Deposit assets, net of allowance for credit losses	7,896	0
Future contract benefits	15	18
Policyholder account balances	344	352
Long-term debt	2,173	2,195
Funds withheld reinsurance liabilities	19,143	5,862
Accumulated other comprehensive income (loss)	1,267	774
Ceded reinsurance contracts | Related Party
Related Party Transaction [Line Items]
Other assets	415	642
Other liabilities	2,547	897
Cash management agreement | Related Party
Related Party Transaction [Line Items]
Other assets	1,798	857
Short-term debt	24	790
Inter company debt | Related Party
Related Party Transaction [Line Items]
Short-term debt	0	50
Accrued inter-company interest payable | Related Party
Related Party Transaction [Line Items]
Other liabilities	5	18
Service agreement | Related Party
Related Party Transaction [Line Items]
Other assets	1	41
Other liabilities	59	37
Assumed/ceded reinsurance contracts | Related Party
Related Party Transaction [Line Items]
Other liabilities	$ 4,226	$ 4,387