Income Taxes - Reconciliation between Federal Income Tax Expense at Statutory Rates and Actual Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income (loss) before income tax:
U.S.	$ 1,240	$ 2,058	$ (768)
Foreign	141	124	(696)
Income (loss) before income tax	1,381	2,182	(1,464)
Income tax expense (benefit) at statutory rate	290	458	(307)
Increase (decrease) in income tax expense (benefit) resulting from:
Exempt investment income	(38)	(48)	(49)
Foreign related tax differential	(15)	(2)	63
Taxes related to domestic affiliate		40
Valuation allowance	1	1	55
Unrecognized tax positions, settlements and adjustments relating to prior years			68
State taxes	36	24	4
Other	4	6	(7)
Income tax expense (benefit)	$ 278	$ 479	$ (173)