Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (42)		$ (120)		$ (123)	$ (163)
Net derivative gains (losses)	(1,240)		(664)		(922)	(2,597)
Net Investment Income	1,258		1,276		2,527	2,499
Pre-tax adjusted earnings (loss)	67		(44)		(316)	(777)
Income tax (expense) benefit	1		23		97	191
Net income (loss)	68	$ (287)	(21)	$ (565)	(219)	(586)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(10)		(60)		(26)	(84)
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)	(12)		(78)		(37)	(110)
Net derivative gains (losses)	0		(1)		(3)	(2)
Pre-tax adjusted earnings (loss)	(12)		(79)		(40)	(112)
Income tax (expense) benefit	2		17		8	24
Net income (loss)	(10)		(62)		(32)	(88)
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)	0		2		7	5
Income tax (expense) benefit	0		0		(1)	(1)
Net income (loss)	0		2		6	4
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		0		3	3
Net Investment Income	0		1		1	1
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)	$ 0		$ 1		$ 3	$ 1