Related Party Transactions (Effects of Affiliated Reinsurance on Balance Sheets) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Effects of Reinsurance [Line Items]
Premiums, reinsurance and other receivables (net of allowance for credit losses)	$ 20,383	$ 19,389
Future policy benefits	32,387	32,149
Market risk benefit liabilities	9,599	10,344
Other liabilities	7,668	7,772
Affiliated Entity | Assumed
Effects of Reinsurance [Line Items]
Premiums, reinsurance and other receivables (net of allowance for credit losses)	30	28
Future policy benefits	50	47
Market risk benefit liabilities	302	367
Other policy-related balances	11	13
Other liabilities	$ (13)	$ (4)