Shares and Stockholders' Equity - Schedule of Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)	$ (4,934)	$ 418	$ 859
Benefits	5,028	8,203	8,027
Income (loss) before taxes	(2,461)	(2,112)	4,034
Federal income tax expense (benefit)	673	437	(737)
Net investment income	5,712	5,274	5,839
Net income (loss)	(1,788)	(1,675)	3,297
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Fixed Maturity AFS Securities and Certain Other Investments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)	(4,014)	(13)	624
Benefits	589
Income (loss) before taxes	(3,425)	(13)	624
Federal income tax expense (benefit)	719	3	(131)
Net income (loss)	(2,706)	(10)	493
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)	7	39	(2)
Income (loss) before taxes	60	103	49
Federal income tax expense (benefit)	(13)	(22)	(10)
Net income (loss)	47	81	39
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Derivative Instruments | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income	(1)	2	3
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Derivative Instruments | Foreign currency contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income	$ 54	$ 62	$ 48