Revenues from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2023	May 31, 2022
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 753,401	$ 1,132,957	$ 1,528,409	$ 2,539,999
Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	727,787	855,565	1,443,855	2,029,929
Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	25,614	277,392	84,554	510,070
Americas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	564,435	959,623	1,178,155	2,128,354
Americas | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	540,001	683,293	1,095,928	1,620,226
Americas | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	24,434	276,330	82,227	508,128
Europe and the Middle East
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	122,509	107,041	239,305	273,771
Europe and the Middle East | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	121,913	106,392	238,132	272,564
Europe and the Middle East | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	596	649	1,173	1,207
Asia
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	66,457	66,293	110,949	137,874
Asia | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	65,873	65,880	109,795	137,139
Asia | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	584	413	1,154	735
Investment banking - Advisory
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	254,157	371,760	551,335	915,529
Investment banking - Advisory | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	254,157	371,760	551,335	915,529
Investment banking - Advisory | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Investment banking - Underwriting
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	238,318	229,099	443,938	630,378
Investment banking - Underwriting | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	238,318	229,099	443,938	630,378
Investment banking - Underwriting | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Equities
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	232,304	251,278	442,766	477,209
Equities | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	232,304	251,278	442,766	477,209
Equities | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Fixed income
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,008	3,428	5,816	6,813
Fixed income | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,008	3,428	5,816	6,813
Fixed income | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Asset management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,864	3,300	22,621	15,869
Asset management | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Asset management | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	4,864	3,300	22,621	15,869
Merchant banking
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	20,750	274,092	61,933	494,201
Merchant banking | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Merchant banking | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 20,750	$ 274,092	$ 61,933	$ 494,201