Related Party Transactions (Effects of Affiliated Reinsurance on Statements of Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Reinsurance Disclosure [Line Items]
Change in market risk benefits	$ (610)	$ 1,064	$ 1,185	$ 2,165
Broker Dealer Activities [Member]
Reinsurance Disclosure [Line Items]
Other Receivables	14		14		$ 14
Affiliated Entity | Assumed
Reinsurance Disclosure [Line Items]
Premiums	1	2	4	5
Universal life and investment-type product policy fees	(1)	(1)	(1)	(1)
Other revenues	0	0	1	1
Policyholder benefits and claims	4	3	11	35
Change in market risk benefits	15	(58)	(62)	(116)
Other expenses	$ (1)	$ 1	$ 0	$ 0