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Short-Term Borrowings (Detail)
€ in Millions
3 Months Ended 9 Months Ended
Aug. 31, 2018
USD ($)
Aug. 31, 2017
USD ($)
Aug. 31, 2018
USD ($)
Aug. 31, 2017
USD ($)
Aug. 31, 2018
EUR (€)
Aug. 31, 2018
USD ($)
Nov. 30, 2017
USD ($)
Short-term Debt [Line Items]              
Short-term borrowings           $ 382,006,000 $ 436,215,000
Interest rate on short-term borrowings outstanding         3.39% 3.39%  
Average daily short-term borrowings $ 422,900,000 $ 436,700,000 $ 498,600,000 $ 474,200,000      
Floating rate puttable notes              
Short-term Debt [Line Items]              
Short-term borrowings           $ 57,985,000 108,240,000
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           0 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 Matured On July 12, 2018              
Short-term Debt [Line Items]              
Debt principal amount           70,500,000  
Equity-lined Notes Matured On July 18, 2017              
Short-term Debt [Line Items]              
Debt principal amount   30,600,000   30,600,000      
Equity-linked Notes Matured On September 20, 2017              
Short-term Debt [Line Items]              
Debt principal amount   $ 4,200,000   $ 4,200,000      
Bank loans              
Short-term Debt [Line Items]              
Short-term borrowings           324,021,000 $ 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%