Shares and Stockholders' Equity - Schedule of Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and debt expense	$ 46	$ 49	$ 142	$ 142
Net investment income	1,304	1,466	3,761	4,351
Realized gain (loss)	(571)	(867)	(345)	(4,513)
Benefits	1,572	1,895	583	5,766
Income (loss) before taxes	(795)	352	956	(2,133)
Income tax benefit (expense)	195	(37)	(138)	564
Net income (loss)	$ (600)	$ 315	818	(1,569)
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)			(15)	(4,293)
Benefits			6	589
Income (loss) before taxes			(9)	(3,704)
Income tax benefit (expense)			2	778
Net income (loss)			(7)	(2,926)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and debt expense			(2)	0
Net investment income			41	42
Realized gain (loss)			1	4
Income (loss) before taxes			40	46
Income tax benefit (expense)			(8)	(10)
Net income (loss)			$ 32	$ 36