Borrowings and Other Secured Financings - Subordinated Debt (Details)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Subordinated Debt
Debt Instrument [Line Items]
Contractual weighted average coupon (as a percent)	4.00%	4.50%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration