Investments - Debt Securities by Contractual Maturity Periods (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost
Due in one year or less	$ 820
Due after one year through five years	4,655
Due after five years through ten years	4,844
Due after ten years	4,206
Mortgage and other asset-backed securities	399
Total	14,924	$ 15,775
Fair Value
Due in one year or less	813
Due after one year through five years	4,454
Due after five years through ten years	4,407
Due after ten years	3,909
Mortgage and other asset-backed securities	367
Total	$ 13,950