Investments - Investments - Available-for-Sale Securities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	$ 39,587		$ 40,788
Allowance for credit losses, fixed maturity, AFS	(15)	$ (13)	(1)	$ (4)	$ (4)	$ (23)
Gross Unrealized Gains, fixed maturities, available-for-sale	91		2,204
Gross Unrealized Losses, fixed maturities, available-for-sale	(3,946)		(144)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	35,717		42,847
ABS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	1,969		1,125
Allowance for credit losses, fixed maturity, AFS	0		0
Gross Unrealized Gains, fixed maturities, available-for-sale	0		13
Gross Unrealized Losses, fixed maturities, available-for-sale	(77)		(3)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	1,892		1,135
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	3,027		3,019
Allowance for credit losses, fixed maturity, AFS	0		0
Gross Unrealized Gains, fixed maturities, available-for-sale	2		8
Gross Unrealized Losses, fixed maturities, available-for-sale	(110)		(2)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	2,919		3,025
CMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	3,601		3,955
Allowance for credit losses, fixed maturity, AFS	(7)	(1)	0
Gross Unrealized Gains, fixed maturities, available-for-sale	22		179
Gross Unrealized Losses, fixed maturities, available-for-sale	(338)		(15)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	3,278		4,119
Corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	16,799		17,744
Allowance for credit losses, fixed maturity, AFS	(8)	(8)	(1)	$ (4)	$ (4)	$ (23)
Gross Unrealized Gains, fixed maturities, available-for-sale	9		1,038
Gross Unrealized Losses, fixed maturities, available-for-sale	(1,912)		(74)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	14,888		18,707
Foreign Govt./Govt. Agencies
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	655		883
Allowance for credit losses, fixed maturity, AFS	0	$ (4)	0
Gross Unrealized Gains, fixed maturities, available-for-sale	0		33
Gross Unrealized Losses, fixed maturities, available-for-sale	(71)		(6)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	584		910
Municipal
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	6,839		7,473
Allowance for credit losses, fixed maturity, AFS	0		0
Gross Unrealized Gains, fixed maturities, available-for-sale	55		787
Gross Unrealized Losses, fixed maturities, available-for-sale	(697)		(3)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	6,197		8,257
RMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	4,218		3,610
Allowance for credit losses, fixed maturity, AFS	0		0
Gross Unrealized Gains, fixed maturities, available-for-sale	2		60
Gross Unrealized Losses, fixed maturities, available-for-sale	(496)		(27)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	3,724		3,643
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Fixed maturities, available-for-sale, at fair value, amortized cost	2,479		2,979
Allowance for credit losses, fixed maturity, AFS	0		0
Gross Unrealized Gains, fixed maturities, available-for-sale	1		86
Gross Unrealized Losses, fixed maturities, available-for-sale	(245)		(14)
Fixed maturities, available-for-sale, at fair value (amortized cost of $54,478 and $53,805)	$ 2,235		$ 3,051