Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (62)	$ (52)			$ (225)	$ (213)
Net derivative gains (losses)	(93)	(838)			(2,690)	(3,251)
Net investment income	1,258	1,174			3,757	3,381
Pre-tax adjusted earnings (loss)	222	647			(555)	(327)
Income tax (expense) benefit	(25)	(121)			166	119
Net income (loss)	197	526	$ (586)	$ (734)	(389)	(208)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(18)	(33)			(102)	(128)
Reclassification out of Accumulated Other Comprehensive Income | Net unrealized investment gains (losses):
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	(22)	(43)			(132)	(159)
Net derivative gains (losses)	(8)	(1)			(10)	(9)
Pre-tax adjusted earnings (loss)	(30)	(44)			(142)	(168)
Income tax (expense) benefit	6	9			30	35
Net income (loss)	(24)	(35)			(112)	(133)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax adjusted earnings (loss)	8	2			13	6
Income tax (expense) benefit	(2)	0			(3)	(1)
Net income (loss)	6	2			10	5
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Interest rate swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net derivative gains (losses)	(1)	0			2	(2)
Net investment income	1	1			2	3
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Foreign currency swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net derivative gains (losses)	$ 8	$ 1			$ 9	$ 5