Outstanding Exposure - Expected Amortization of Net Par Outstanding (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Expected Amortization of Net Par Outstanding [Abstract]
0 to 5 years	$ 50,311
5 to 10 years	50,698
10 to 15 years	43,432
15 to 20 years	32,588
20 years and above	56,229
Total net par outstanding	233,258	$ 236,392
Public finance
Expected Amortization of Net Par Outstanding [Abstract]
0 to 5 years	47,218
5 to 10 years	47,902
10 to 15 years	41,695
15 to 20 years	31,597
20 years and above	55,687
Total net par outstanding	224,099	227,164
Structured finance
Expected Amortization of Net Par Outstanding [Abstract]
0 to 5 years	3,093
5 to 10 years	2,796
10 to 15 years	1,737
15 to 20 years	991
20 years and above	542
Total net par outstanding	$ 9,159	$ 9,228