Segment Reporting - Net Revenues, Expenses and Total Assets by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Nov. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 821,246	$ 795,513
Non-interest expenses	698,508	671,314
Earnings before income taxes	122,738	124,199
Segment assets	41,162,990		$ 39,705,691
Capital Markets
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	812,400	782,600
Non-interest expenses	683,300	656,700
Earnings before income taxes	129,100	125,900
Segment assets	39,983,000		38,620,400
Asset Management
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	8,800	12,900
Non-interest expenses	15,200	14,600
Earnings before income taxes	(6,400)	$ (1,700)
Segment assets	$ 1,180,000		$ 1,085,300