Fair Value of Financial Instruments - Carrying and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
ASSETS
Fixed maturity AFS securities	$ 88,738	$ 99,736
Trading securities	2,359	3,498
Equity securities	306	427
Mortgage loans on real estate	18,963	18,301
Derivative investments	6,474	3,594
Other investments	5,015	3,739
MRB assets	3,894	2,807
Policyholder account balances:
MRB liabilities	$ (1,716)	$ (2,078)
Other liabilities:
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Carrying Value
ASSETS
Trading securities	$ 2,359	$ 3,498
Equity securities	306	427
Mortgage loans on real estate	18,963	18,301
Derivative investments	6,474	3,594
Other investments	5,015	3,739
Cash and invested cash	3,365	3,343
MRB assets	3,894	2,807
Other assets:
Separate account assets	158,257	143,536
Policyholder account balances:
Funds withheld reinsurance liabilities – reinsurance-related embedded derivatives	(552)	416
MRB liabilities	(1,716)	(2,078)
Short-term debt	(250)	(500)
Long-term debt	(5,699)	(5,955)
Fair Value
ASSETS
Trading securities	2,359	3,498
Equity securities	306	427
Mortgage loans on real estate	17,407	16,553
Derivative investments	6,474	3,594
Other investments	5,015	3,739
Cash and invested cash	3,365	3,343
MRB assets	3,894	2,807
Other assets:
Separate account assets	158,257	143,536
Policyholder account balances:
Funds withheld reinsurance liabilities – reinsurance-related embedded derivatives	(552)	416
MRB liabilities	(1,716)	(2,078)
Short-term debt	(249)	(496)
Long-term debt	(5,182)	(5,005)
Other assets | Carrying Value
Other assets:
Ceded MRBs	2	12
Indexed annuity ceded embedded derivatives	940	525
Other assets | Fair Value
Other assets:
Ceded MRBs	2	12
Indexed annuity ceded embedded derivatives	940	525
Policyholder account balances | Carrying Value
Policyholder account balances:
Account balances of certain investment contracts	(44,640)	(43,578)
RILA, fixed annuity and IUL contracts	(9,077)	(4,783)
Policyholder account balances | Fair Value
Policyholder account balances:
Account balances of certain investment contracts	(34,041)	(34,274)
RILA, fixed annuity and IUL contracts	(9,077)	(4,783)
Other liabilities | Carrying Value
Other liabilities:
Ceded MRBs	(239)	(205)
Derivative liabilities	(356)	(210)
Remaining guaranteed interest and similar contracts	(411)	(574)
Other liabilities | Fair Value
Other liabilities:
Ceded MRBs	(239)	(205)
Derivative liabilities	(356)	(210)
Remaining guaranteed interest and similar contracts	(411)	(574)
Fixed maturity AFS securities | Carrying Value
ASSETS
Fixed maturity AFS securities	88,738	99,736
Fixed maturity AFS securities | Fair Value
ASSETS
Fixed maturity AFS securities	$ 88,738	$ 99,736