Related Party Transactions (Effects of Affiliated Reinsurance on Balance Sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Effects of Reinsurance [Line Items]
Premiums, reinsurance and other receivables (net of allowance for credit losses)	$ 19,718	$ 19,389
Future policy benefits	31,508	32,149
Market risk benefit liabilities	8,727	10,344
Other liabilities	6,960	7,772
Affiliated Entity | Assumed
Effects of Reinsurance [Line Items]
Premiums, reinsurance and other receivables (net of allowance for credit losses)	29	28
Future policy benefits	47	47
Market risk benefit liabilities	273	367
Other policy-related balances	8	13
Other liabilities	$ (8)	$ (4)