Outstanding Exposure - Debt Service Outstanding (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Debt Service
Gross	$ 412,138	$ 398,037
Net	411,637	397,636
Par Outstanding
Gross	258,677	249,535
Net	258,196	249,153
Public finance
Debt Service
Gross	400,188	386,494
Net	400,113	386,419
Par Outstanding
Gross	247,976	239,352
Net	247,920	239,296
Structured finance
Debt Service
Gross	11,950	11,543
Net	11,524	11,217
Par Outstanding
Gross	10,701	10,183
Net	$ 10,276	$ 9,857