Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (120)		$ (65)		$ (163)	$ (161)
Net derivative gains (losses)	(664)		(1,825)		(2,597)	(2,413)
Net investment income	1,276		1,172		2,499	2,207
Pre-tax adjusted earnings (loss)	(44)		(282)		(777)	(974)
Income tax (expense) benefit	23		73		191	240
Net income (loss)	(21)	$ (565)	(209)	$ (525)	(586)	(734)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(60)		(40)		(84)	(95)
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)	(78)		(48)		(110)	(116)
Net derivative gains (losses)	(1)		(7)		(2)	(8)
Pre-tax adjusted earnings (loss)	(79)		(55)		(112)	(124)
Income tax (expense) benefit	17		12		24	26
Net income (loss)	(62)		(43)		(88)	(98)
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)	2		4		5	4
Income tax (expense) benefit	0		(1)		(1)	(1)
Net income (loss)	2		3		4	3
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		(2)		3	(2)
Net investment income	1		1		1	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)	$ 1		$ 5		$ 1	$ 4