Loans, Lending Commitments and Related Allowance for Credit Losses - Employee Loans (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Employee Loans [Line Items]
Other receivables	$ 151,010	$ 114,720
Employee loans	5,039	4,858
ACL	(119)	(127)
Employee loans, net of ACL	$ 4,920	$ 4,731
Remaining repayment term, weighted average in years	5 years 8 months 12 days	5 years 8 months 12 days
Currently employed by the Firm \| Related Party
Employee Loans [Line Items]
Other receivables	$ 4,949	$ 4,769
No longer employed by the Firm \| Related Party
Employee Loans [Line Items]
Other receivables	$ 90	$ 89

Amount due from parties in nontrade transactions, classified as other.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant