Investments - Available-for-Sale Securities by Contractual Maturities (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Amortized Cost
Total fixed maturity AFS securities	$ 89,604	$ 88,978
Fair Value
Total fixed maturity AFS securities	83,110	$ 81,900
Fixed maturity AFS securities other than structured securities
Amortized Cost
Due in one year or less	4,308
Due after one year through five years	18,599
Due after five years through ten years	13,675
Due after ten years	34,880
Total fixed maturity AFS securities	71,462
Fair Value
Due in one year or less	4,288
Due after one year through five years	18,191
Due after five years through ten years	12,961
Due after ten years	30,013
Total fixed maturity AFS securities	65,453
Structured securities (RMBS, CMBS, ABS)
Amortized Cost
Total fixed maturity AFS securities	18,142
Fair Value
Total fixed maturity AFS securities	$ 17,657