Investments - Available-for-Sale Securities by Contractual Maturities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost
Total fixed maturity AFS securities	$ 88,676	$ 88,231
Fair Value
Total fixed maturity AFS securities	81,880	$ 82,300
Fixed maturity AFS securities other than structured securities
Amortized Cost
Due in one year or less	4,747
Due after one year through five years	17,819
Due after five years through ten years	14,991
Due after ten years	35,064
Total fixed maturity AFS securities	72,621
Fair Value
Due in one year or less	4,706
Due after one year through five years	17,165
Due after five years through ten years	13,902
Due after ten years	30,889
Total fixed maturity AFS securities	66,662
Structured securities (RMBS, CMBS, ABS)
Amortized Cost
Total fixed maturity AFS securities	16,055
Fair Value
Total fixed maturity AFS securities	$ 15,218