Segment Reporting - Net Revenues, Expenses and Total Assets by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021	Nov. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 1,129,525	$ 1,617,418	$ 2,671,299	$ 3,746,784
Non-interest expenses	940,489	1,188,119	2,045,369	2,646,315
Earnings before income taxes	189,036	429,299	625,930	1,100,469
Assets	53,156,330		53,156,330		$ 54,768,900
Investment Banking and Capital Markets
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	1,098,400	1,573,100	2,580,200	3,531,900
Non-interest expenses	910,400	1,146,400	1,971,300	2,562,600
Earnings before income taxes	188,000	426,700	608,900	969,300
Assets	49,837,800		49,837,800		51,697,400
Asset Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	31,100	44,300	91,100	214,900
Non-interest expenses	30,100	41,700	74,100	83,700
Earnings before income taxes	1,000	$ 2,600	17,000	$ 131,200
Assets	$ 3,318,500		$ 3,318,500		$ 3,071,500