Short-Term Borrowings (Detail) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018	Dec. 27, 2018	Nov. 30, 2018
Short-term Debt [Line Items]
Short-term borrowings	$ 510,435,000		$ 510,435,000			$ 387,492,000
Interest rate on short-term borrowings outstanding	3.58%		3.58%
Average daily short-term borrowings	$ 766,100,000	$ 584,700,000	$ 623,400,000	$ 536,900,000
Credit facility maximum borrowing capacity					$ 135,000,000.0
Floating rate puttable notes
Short-term Debt [Line Items]
Short-term borrowings	55,845,000		55,845,000			56,550,000
Bank loans
Short-term Debt [Line Items]
Short-term borrowings	454,590,000		454,590,000			$ 330,942,000
Revolving Credit Facility | Intraday Credit Facility
Short-term Debt [Line Items]
Credit facility maximum borrowing capacity	$ 150,000,000.0		$ 150,000,000.0
Revolving Credit Facility | Intraday Credit Facility | Federal funds effective rate
Short-term Debt [Line Items]
Basis spread on variable rate			0.50%