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]
Net investment income	$ 1,332	$ 1,508	$ 2,679	$ 2,974
Interest and debt expense	(86)	(84)	(167)	(166)
Realized gain (loss)	663	(1,784)	230	(2,612)
Benefits	(2,008)	(2,192)	(4,011)	(4,483)
Income (loss) before taxes	1,096	602	2,625	(568)
Federal income tax expense (benefit)	(201)	(91)	(509)	198
Net income (loss)	$ 895	$ 511	2,116	(370)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Fixed Maturity AFS Securities and Certain
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)			(159)	(707)
Benefits			22	0
Income (loss) before taxes			(137)	(707)
Federal income tax expense (benefit)			29	148
Net income (loss)			(108)	(559)
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			15	13
Realized gain (loss)			(1)	3
Income (loss) before taxes			42	43
Federal income tax expense (benefit)			(9)	(9)
Net income (loss)			33	34
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)	0
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			$ 29	$ 27