Loans, Lending Commitments and Related Allowance for Credit Losses - Employee Loans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Employee Loans [Line Items]
Employee loans	$ 3,726	$ 3,240
Allowance for credit losses	(153)	(165)
Employee loans, net of ACL	$ 3,573	$ 3,075
Repayment term range, in years	5 years 8 months 12 days	5 years 3 months 18 days
Currently employed by the Firm
Employee Loans [Line Items]
Employee loans	$ 3,613	$ 3,100
No longer employed by the Firm
Employee Loans [Line Items]
Employee loans	$ 113	$ 140