Short-Term Borrowings (Detail) € in Millions	3 Months Ended		6 Months Ended
	May 31, 2018 USD ($)	May 31, 2017 USD ($)	May 31, 2018 USD ($)	May 31, 2017 USD ($)	May 31, 2018 EUR (€)	May 31, 2018 USD ($)	Nov. 30, 2017 USD ($)
Short-term Debt [Line Items]
Short-term borrowings						$ 506,218,000	$ 436,215,000
Interest rate on short-term borrowings outstanding					3.99%	3.99%
Average daily short-term borrowings	$ 584,700,000	$ 537,300,000	$ 536,900,000	$ 493,200,000
Floating rate puttable notes
Short-term Debt [Line Items]
Short-term borrowings						$ 58,470,000	108,240,000
Floating rate puttable notes matured April 8, 2018
Short-term Debt [Line Items]
Debt principal amount | €					€ 30.0
Floating rate puttable notes matured May 3, 2018
Short-term Debt [Line Items]
Debt principal amount | €					€ 11.0
Equity-linked notes
Short-term Debt [Line Items]
Short-term borrowings						68,818,000	23,324,000
Equity-inked Notes Matured On December 7, 2017
Short-term Debt [Line Items]
Debt principal amount							23,300,000
Equity-linked Notes Due July 12, 2018
Short-term Debt [Line Items]
Debt principal amount						70,500,000
Bank loans
Short-term Debt [Line Items]
Short-term borrowings						378,930,000	$ 304,651,000
Line of credit | Intraday Credit Facility
Short-term Debt [Line Items]
Credit facility maximum borrowing capacity						$ 150,000,000
Line of credit | Intraday Credit Facility | Federal funds effective rate
Short-term Debt [Line Items]
Basis spread on variable rate			0.50%