Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (81)	$ (43)
Net derivative gains (losses)	318	(1,933)
Net investment income	1,269	1,223
Pre-tax adjusted earnings (loss)	(383)	(733)
Income tax (expense) benefit	96	168
Net income (loss)	(287)	(565)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(16)	(24)
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)	(25)	(32)
Net derivative gains (losses)	(3)	(1)
Pre-tax adjusted earnings (loss)	(28)	(33)
Income tax (expense) benefit	6	7
Net income (loss)	(22)	(26)
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)	7	3
Income tax (expense) benefit	(1)	(1)
Net income (loss)	6	2
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)	3	0
Net investment income	1	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)	$ 3	$ 0