Business, Basis of Presentation and Summary of Significant Accounting Policies - Transition Table - SCF (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ 8,539	$ 10,743
Policyholder account balances: Deposits	74,327	84,199
Policyholder account balances: Withdrawals	(70,834)	(79,679)
Net cash provided by (used in) financing activities	$ (2,764)	(5,480)
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities		10,670
Policyholder account balances: Deposits		83,707
Policyholder account balances: Withdrawals		(79,114)
Net cash provided by (used in) financing activities		(5,407)
Revision of Prior Period, Accounting Standards Update, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by (Used in) Operating Activities		73
Policyholder account balances: Deposits		492
Policyholder account balances: Withdrawals		565
Net cash provided by (used in) financing activities		$ (73)