Shares and Stockholders' Equity - Schedule of Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and debt expense	$ 48	$ 47	$ 96	$ 93
Net investment income	1,232	1,476	2,456	2,885
Realized gain (loss)	283	(3,252)	226	(3,646)
Benefits	(2,726)	1,676	(989)	3,872
Income (loss) before taxes	927	(1,255)	1,751	(2,485)
Income tax benefit (expense)	(166)	299	(333)	601
Net income (loss)	$ 761	$ (956)	1,418	(1,884)
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)			(111)	(3,140)
Benefits			5	418
Income (loss) before taxes			(106)	(2,722)
Income tax benefit (expense)			22	572
Net income (loss)			(84)	(2,150)
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			(1)	0
Net investment income			29	27
Realized gain (loss)			(1)	3
Income (loss) before taxes			27	30
Income tax benefit (expense)			(6)	(6)
Net income (loss)			$ 21	$ 24