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Investments (Fixed Maturity Securities Available-For-Sale by Sector) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 299,532		$ 310,884
Allowance for Credit Loss for Debt Securities	(261)	$ (355)	(91)	$ (99)	$ (104)	$ (81)
Gross Unrealized Gains	8,666		31,901
Gross Unrealized Losses	23,759		2,420
Estimated Fair Value of Fixed Maturity Securities AFS	284,178		340,274
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	85,276		82,694
Allowance for Credit Loss for Debt Securities	(28)	(13)	(30)	(39)	(43)	(44)
Gross Unrealized Gains	2,012		10,651
Gross Unrealized Losses	6,705		281
Estimated Fair Value of Fixed Maturity Securities AFS	80,555		93,034
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	59,287		59,124
Allowance for Credit Loss for Debt Securities	(53)	(102)	(28)	(32)	(33)	(16)
Gross Unrealized Gains	1,397		5,275
Gross Unrealized Losses	6,454		731
Estimated Fair Value of Fixed Maturity Securities AFS	54,177		63,640
Foreign government
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	49,377		56,848
Allowance for Credit Loss for Debt Securities	(166)	(226)	(19)	(21)	(21)	(21)
Gross Unrealized Gains	2,460		5,603
Gross Unrealized Losses	3,655		823
Estimated Fair Value of Fixed Maturity Securities AFS	48,016		61,609
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	34,314		41,068
Allowance for Credit Loss for Debt Securities	0		0
Gross Unrealized Gains	1,583		5,807
Gross Unrealized Losses	2,207		276
Estimated Fair Value of Fixed Maturity Securities AFS	33,690		46,599
RMBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	29,068		29,152
Allowance for Credit Loss for Debt Securities	0		0
Gross Unrealized Gains	368		1,440
Gross Unrealized Losses	2,133		188
Estimated Fair Value of Fixed Maturity Securities AFS	27,303		30,404
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17,910		18,443
Allowance for Credit Loss for Debt Securities	0		0
Gross Unrealized Gains	41		185
Gross Unrealized Losses	897		59
Estimated Fair Value of Fixed Maturity Securities AFS	17,054		18,569
Municipals
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,881		11,761
Allowance for Credit Loss for Debt Securities	0		0
Gross Unrealized Gains	672		2,464
Gross Unrealized Losses	1,040		13
Estimated Fair Value of Fixed Maturity Securities AFS	12,513		14,212
CMBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,419		11,794
Allowance for Credit Loss for Debt Securities	(14)	$ (14)	(14)	$ (7)	$ (7)	$ 0
Gross Unrealized Gains	133		476
Gross Unrealized Losses	668		49
Estimated Fair Value of Fixed Maturity Securities AFS	$ 10,870		$ 12,207