Related Party Transactions (Effects of Affiliated Reinsurance on Statements of Operations) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reinsurance Disclosure [Line Items]
Change in market risk benefits	$ 357	$ 1,299	$ 1,795	$ 1,101
Affiliated Entity | Assumed
Reinsurance Disclosure [Line Items]
Premiums	1	1	3	3
Other revenues	1	1	1	1
Policyholder benefits and claims	3	14	7	32
Change in market risk benefits	(20)	(63)	(77)	(58)
Other expenses	$ (1)	$ (1)	$ 1	$ (1)