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Long-Term Debt - Summary of Long-Term Debt Carrying Values Including Unamortized Discounts and Premiums (Detail) - USD ($)
Jan. 17, 2017
Nov. 30, 2017
Nov. 30, 2016
Debt Instrument [Line Items]      
Long-term debt   $ 6,416,844,000 $ 5,483,355,000
3.875% Convertible Senior Debentures      
Debt Instrument [Line Items]      
Debt instrument interest rate   3.875%  
Debt principal amount   $ 345,000,000.0  
Unsecured debt | 5.125% Senior Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   5.125%  
Effective interest rate   3.46%  
Long-term debt   $ 682,338,000 817,813,000
Unsecured debt | 8.500% Senior Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   8.50%  
Effective interest rate   4.00%  
Long-term debt   $ 728,872,000 778,367,000
Unsecured debt | 2.375% Euro Medium Term Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   2.375%  
Effective interest rate   2.42%  
Long-term debt   $ 593,334,000 528,250,000
Unsecured debt | 6.875% Senior Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   6.875%  
Effective interest rate   4.40%  
Long-term debt   $ 808,157,000 823,797,000
Unsecured debt | 2.250% Euro Medium Term Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   2.25%  
Effective interest rate   4.08%  
Long-term debt   $ 4,389,000 3,848,000
Unsecured debt | 5.125% Senior Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   5.125%  
Effective interest rate   4.55%  
Long-term debt   $ 615,703,000 618,355,000
Unsecured debt | 4.850% Senior Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   4.85%  
Effective interest rate   4.93%  
Long-term debt   $ 736,357,000 0
Debt principal amount $ 750,000,000    
Unsecured debt | 6.450% Senior Debentures      
Debt Instrument [Line Items]      
Debt instrument interest rate   6.45%  
Effective interest rate   5.46%  
Long-term debt   $ 375,794,000 377,806,000
Unsecured debt | 3.875% Convertible Senior Debentures      
Debt Instrument [Line Items]      
Debt instrument interest rate   3.875%  
Effective interest rate   3.50%  
Long-term debt   $ 324,779,000 346,187,000
Unsecured debt | 6.250% Senior Debentures      
Debt Instrument [Line Items]      
Debt instrument interest rate   6.25%  
Effective interest rate   6.03%  
Long-term debt   $ 512,040,000 512,396,000
Unsecured debt | 6.500% Senior Notes      
Debt Instrument [Line Items]      
Debt instrument interest rate   6.50%  
Effective interest rate   6.09%  
Long-term debt   $ 420,990,000 421,333,000
Unsecured debt | Structured notes      
Debt Instrument [Line Items]      
Long-term debt   614,091,000 255,203,000
Debt principal amount   329,900,000 275,400,000
Debt fair value   607,000,000 $ 248,900,000
Debt maturities in 2018   7,100,000  
Debt maturities in 2019   6,000,000  
Debt maturities in 2022   25,000,000  
Debt maturities in 2024 or thereafter   $ 576,000,000  
Unsecured debt | Interest rate swaps | 4.850% Senior Notes      
Debt Instrument [Line Items]      
Decrease of long-term debt $ 8,100,000