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)	$ (387)	$ (375)
Net investment income	4,885	5,436
Net derivative gains (losses)	432	(979)
Other expenses	3,350	3,217
Income (loss) from continuing operations before provision for income tax	1,354	1,045
Income tax (expense) benefit	(404)	(170)
Net income (loss)	950	875
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	92	(424)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Investment Gains (Losses), Net of Related Offsets
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	(285)	(159)
Net investment income	0	(1)
Net derivative gains (losses)	44	15
Income (loss) from continuing operations before provision for income tax	(241)	(145)
Income tax (expense) benefit	54	32
Net income (loss)	(187)	(113)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before provision for income tax	379	(357)
Income tax (expense) benefit	(76)	73
Net income (loss)	303	(284)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	0	2
Net investment income	17	8
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 investment gains (losses)	360	(368)
Net investment income	2	1
Reclassification out of Accumulated Other Comprehensive Income | Defined Benefit Plans Adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net actuarial gains (losses)	(34)	(35)
Amortization of prior service (costs) credit	3	3
Income (loss) from continuing operations before provision for income tax	(31)	(32)
Income tax (expense) benefit	7	5
Net income (loss)	$ (24)	$ (27)