Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (685)		$ 1,605		$ (1,203)	$ 1,739
Net investment income	3,583		5,280		7,867	10,594
Net derivative gains (losses)	(1,195)		421		(2,054)	(1,814)
Other expenses	3,083		2,881		6,103	6,031
Income (loss) from continuing operations before provision for income tax	(2)		4,487		713	4,778
Income tax (expense) benefit	140		(1,075)		99	(1,003)
Net income (loss)	138	$ 674	3,412	$ 363	812	3,775
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(1,043)		104		(1,402)	(68)
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)	(772)		(6)		(1,122)	(55)
Net investment income	2		(4)		4	(9)
Net derivative gains (losses)	88		25		115	49
Income (loss) from continuing operations before provision for income tax	(682)		15		(1,003)	(15)
Income tax (expense) benefit	155		(3)		230	4
Net income (loss)	(527)		12		(773)	(11)
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	(629)		131		(741)	(43)
Income tax (expense) benefit	132		(27)		152	10
Net income (loss)	(497)		104		(589)	(33)
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)	42		19		60	48
Net investment income	16		15		31	27
Other expenses	1		0		2	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 investment gains (losses)	(690)		95		(838)	(124)
Net investment income	1		1		3	4
Other expenses	1		1		1	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)	(26)		(35)		(53)	(53)
Amortization of prior service (costs) credit	3		18		6	22
Income (loss) from continuing operations before provision for income tax	(23)		(17)		(47)	(31)
Income tax (expense) benefit	4		5		7	7
Net income (loss)	$ (19)		$ (12)		$ (40)	$ (24)