Short-Term Borrowings - Schedule of Line of Credit Facilities (Details) - USD ($)	12 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Short-term Debt [Line Items]
Short-term borrowings	$ 764,715,000	$ 548,490,000
Revolving credit facility | Federal funds rate
Short-term Debt [Line Items]
Basis spread on variable rate	2.00%
Royal Bank of Canada credit facility | Base rate
Short-term Debt [Line Items]
Basis spread on variable rate	2.05%
Line of credit
Short-term Debt [Line Items]
Short-term borrowings	$ 746,000,000	486,000,000
Line of credit | Revolving credit facility | Bank of New York Mellon credit facility
Short-term Debt [Line Items]
Committed amount	100,000,000.0
Bank of New York Mellon master loan agreement | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	300,000,000	351,000,000
JPMorgan Chase Bank, N.A. credit facility | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	246,000,000	135,000,000
Royal Bank of Canada credit facility | Line of credit
Short-term Debt [Line Items]
Short-term borrowings	200,000,000	0
Bank of New York Mellon credit facility | Line of credit | Revolving credit facility
Short-term Debt [Line Items]
Short-term borrowings	$ 0	$ 0