Outstanding Exposure - Debt Service Outstanding (Details) - USD ($) $ in Millions	Dec. 31, 2023	Aug. 31, 2023	Dec. 31, 2022
Debt Service
Gross	$ 398,037		$ 370,172
Net	397,636		369,951
Par Outstanding
Gross	249,535		233,438
Net	249,153	$ 108	233,258
Public finance
Debt Service
Gross	386,494		359,899
Net	386,419		359,703
Par Outstanding
Gross	239,352		224,254
Net	239,296		224,099
Structured finance
Debt Service
Gross	11,543		10,273
Net	11,217		10,248
Par Outstanding
Gross	10,183		9,184
Net	$ 9,857		$ 9,159