Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ 44	$ (62)			$ (79)	$ (225)
Net derivative gains (losses)	(408)	(93)			(1,330)	(2,690)
Net Investment Income	1,309	1,258			3,836	3,757
Pre-tax adjusted earnings (loss)	464	222			148	(555)
Income tax (expense) benefit	(83)	(25)			14	166
Net income (loss)	381	197	$ (219)	$ (586)	162	(389)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(13)	(18)			(39)	(102)
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)	(17)	(22)			(54)	(132)
Net derivative gains (losses)	4	(8)			1	(10)
Pre-tax adjusted earnings (loss)	(13)	(30)			(53)	(142)
Income tax (expense) benefit	3	6			11	30
Net income (loss)	(10)	(24)			(42)	(112)
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)	(3)	8			4	13
Income tax (expense) benefit	0	(2)			(1)	(3)
Net income (loss)	(3)	6			3	10
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)	0	(1)			3	2
Net Investment Income	1	1			2	2
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)	$ (4)	$ 8			$ (1)	$ 9