Revenues from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 859,376	$ 1,225,658	$ 2,046,446	$ 2,473,171
Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	856,076	1,223,343	2,030,577	2,463,943
Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,300	2,315	15,869	9,228
Americas
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	687,104	964,567	1,636,743	1,998,067
Americas | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	683,804	962,556	1,620,874	1,989,472
Americas | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,300	2,011	15,869	8,595
Europe
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	106,392	197,195	272,564	361,261
Europe | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	106,392	196,891	272,564	360,628
Europe | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	304	0	633
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	65,880	63,896	137,139	113,843
Asia Pacific | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	65,880	63,896	137,139	113,843
Asia Pacific | Asset Management
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	0	0	0	0
Investment banking - Advisory
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	371,760	390,508	915,529	701,947
Investment banking - Advisory | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	371,760	390,508	915,529	701,947
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	229,455	610,192	630,734	1,302,415
Investment banking - Underwriting | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	229,455	610,192	630,734	1,302,415
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	251,433	219,855	477,501	453,394
Equities | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	251,433	219,855	477,501	453,394
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	3,428	2,788	6,813	6,187
Fixed income | Investment Banking and Capital Markets
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	3,428	2,788	6,813	6,187
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	3,300	2,315	15,869	9,228
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	$ 3,300	$ 2,315	$ 15,869	$ 9,228