Reinsurance (Effects of Affiliated Reinsurance on Statements of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Premiums:
Reinsurance assumed	$ 8	$ (10)	$ 12
Universal life and investment-type product policy fees [Abstract]
Reinsurance assumed	52	50	55
Other revenues:
Commissions Fees And Other Income Assumed	3	6	18
Policyholder benefits and claims:
Reinsurance assumed	152	125	158
Other Expenses [Abstract]
Assumed Other Expenses	(17)	(5)	2
Affiliated Entity | Assumed index-linked annuities
Premiums:
Reinsurance assumed	2	2	2
Universal life and investment-type product policy fees [Abstract]
Reinsurance assumed	6	6	7
Other revenues:
Commissions Fees And Other Income Assumed	2	2	2
Policyholder benefits and claims:
Reinsurance assumed	51	25	55
Other Expenses [Abstract]
Assumed Other Expenses	$ (23)	$ (28)	$ (21)