Credit Concentrations - Credit Concentrations Included in Trading Cash Instruments and Investments (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
U.S. government and agency obligations
Concentration Risk [Line Items]
Concentration risk, credit risk, financial instrument, maximum exposure	$ 185,061	$ 141,191
Concentration risk, credit risk, financial instrument, maximum exposure, as a percentage of total assets	11.90%	9.60%
Non-U.S. government and agency obligations
Concentration Risk [Line Items]
Concentration risk, credit risk, financial instrument, maximum exposure	$ 71,787	$ 51,426
Concentration risk, credit risk, financial instrument, maximum exposure, as a percentage of total assets	4.60%	3.50%