Segment Reporting - Net Revenues, Expenses and Total Assets by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Nov. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 1,541,774	$ 2,129,366
Non-interest expenses	1,104,880	1,458,196
Earnings before income taxes	436,894	671,170
Assets	55,899,398		$ 54,768,900
Investment Banking and Capital Markets
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	1,481,800	1,958,800
Non-interest expenses	1,060,900	1,416,200
Earnings before income taxes	420,900	542,600
Assets	52,729,500		51,697,400
Asset Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	60,000	170,600
Non-interest expenses	44,000	42,000
Earnings before income taxes	16,000	$ 128,600
Assets	$ 3,169,900		$ 3,071,500