Investments - Available-for-Sale Securities by Contractual Maturities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Total fixed maturity AFS securities	$ 88,998	$ 88,231
Fair Value
Total fixed maturity AFS securities	84,571	$ 82,300
Fixed maturity AFS securities other than structured securities
Amortized Cost
Due in one year or less	4,750
Due after one year through five years	18,005
Due after five years through ten years	14,186
Due after ten years	35,050
Total fixed maturity AFS securities	71,991
Fair Value
Due in one year or less	4,724
Due after one year through five years	17,705
Due after five years through ten years	13,618
Due after ten years	31,923
Total fixed maturity AFS securities	67,970
Structured securities (RMBS, CMBS, ABS)
Amortized Cost
Total fixed maturity AFS securities	17,007
Fair Value
Total fixed maturity AFS securities	$ 16,601