Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (927)	$ (411)			$ (2,650)	$ (1,610)
Net investment income	4,825	3,585			14,542	11,452
Net derivative gains (losses)	(1,202)	(226)			(2,289)	(2,147)
Other expenses	3,204	2,922			9,394	8,782
Income (loss) from continuing operations before provision for income tax	534	1,415			1,221	4,338
Income tax (expense) benefit	(39)	(248)			(233)	(617)
Net income (loss)	495	1,167	$ 493	$ 2,554	988	3,721
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(776)	(705)			(1,758)	(2,107)
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)	(730)	(336)			(2,420)	(1,458)
Net investment income	1	0			6	4
Net derivative gains (losses)	19	(7)			98	108
Income (loss) from continuing operations before provision for income tax	(710)	(343)			(2,316)	(1,346)
Income tax (expense) benefit	172	77			532	307
Net income (loss)	(538)	(266)			(1,784)	(1,039)
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	(271)	(566)			130	(1,307)
Income tax (expense) benefit	57	145			(30)	297
Net income (loss)	(214)	(421)			100	(1,010)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) on Derivatives | Interest Rate Contract
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	17	(16)			77	44
Net investment income	11	15			38	46
Other expenses	0	1			0	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 investment gains (losses)	(301)	(567)			10	(1,405)
Net investment income	1	1			3	4
Other expenses	1	0			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)	(33)	(25)			(98)	(78)
Amortization of prior service (costs) credit	3	2			8	8
Income (loss) from continuing operations before provision for income tax	(30)	(23)			(90)	(70)
Income tax (expense) benefit	6	5			16	12
Net income (loss)	$ (24)	$ (18)			$ (74)	$ (58)