Equity (Reclassifications Out of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment gains (losses)	$ (1,039)		$ (682)		$ (1,723)	$ (1,199)
Net investment income	5,072		3,583		9,717	7,867
Net derivative gains (losses)	(997)		(970)		(1,087)	(1,921)
Other expenses	3,133		2,908		6,190	5,860
Income (loss) from continuing operations before provision for income tax	430		988		687	2,923
Income tax (expense) benefit	(22)		(73)		(194)	(369)
Net income (loss)	408	$ 85	915	$ 1,639	493	2,554
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	(620)		(1,043)		(982)	(1,402)
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)	(1,079)		(772)		(1,690)	(1,122)
Net investment income	3		2		5	4
Net derivative gains (losses)	36		88		79	115
Income (loss) from continuing operations before provision for income tax	(1,040)		(682)		(1,606)	(1,003)
Income tax (expense) benefit	231		155		360	230
Net income (loss)	(809)		(527)		(1,246)	(773)
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	269		(629)		401	(741)
Income tax (expense) benefit	(54)		132		(87)	152
Net income (loss)	215		(497)		314	(589)
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)	55		42		60	60
Net investment income	13		16		27	31
Other expenses	0		1		0	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 investment gains (losses)	200		(690)		311	(838)
Net investment income	1		1		2	3
Other expenses	0		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)	(32)		(26)		(65)	(53)
Amortization of prior service (costs) credit	2		3		5	6
Income (loss) from continuing operations before provision for income tax	(30)		(23)		(60)	(47)
Income tax (expense) benefit	4		4		10	7
Net income (loss)	$ (26)		$ (19)		$ (50)	$ (40)