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]
Net investment income	$ 1,411	$ 1,494	$ 4,090	$ 4,468
Interest and debt expense	(86)	(84)	(253)	(250)
Realized gain (loss)	(431)	(453)	(201)	(3,066)
Benefits	(1,937)	(2,152)	(5,948)	(6,635)
Income (loss) before taxes	(703)	1,034	1,922	466
Federal income tax expense (benefit)	175	(181)	(334)	17
Net income (loss)	$ (528)	$ 853	1,588	483
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)			(193)	(1,175)
Benefits			30	30
Income (loss) before taxes			(163)	(1,145)
Federal income tax expense (benefit)			34	247
Net income (loss)			(129)	(898)
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			20	22
Realized gain (loss)			1	4
Income (loss) before taxes			60	68
Federal income tax expense (benefit)			(13)	(14)
Net income (loss)			47	54
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			(2)	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			$ 41	$ 42