Quarterly Results of Operations (Balance Sheet II) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Available-for-sale securities, at fair value:
Fixed maturity available-for-sale securities (amortized cost)	$ 110,944	$ 110,323	$ 108,963	$ 106,939	$ 104,491	$ 106,752	$ 105,530	$ 104,684
Fixed maturity, ACL	21	18	12	20	19	17	9	14	$ 13
Mortgage loans on real estate, fair value	$ 487	$ 495	$ 528	$ 537	$ 739	$ 792	$ 818	$ 874
Stockholder’s Equity
Common stock - shares authorized (in shares)	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000
Common stock - shares issued (in shares)	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000
Common stock - shares outstanding (in shares)	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000	10,000,000