Debt Table (Details) - USD ($) $ in Thousands	May. 31, 2015	Nov. 30, 2014
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term debt	$ 1,050,619	$ 1,092,478
Short-term debt	140,304	131,524
Long-term and short-term debt	1,190,923	1,224,002
Unsecured: [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term debt	1,050,619	1,092,478
4.25% Yen-denominated Eurobonds, due 2016 [Member] | Bonds [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term debt	$ 31,784	33,985
Debt Instrument, Interest Rate, Stated Percentage	4.25%
7.625% Senior Notes, Due 2020 [Member] | Senior notes [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term debt	$ 0	525,000
Debt Instrument, Interest Rate, Stated Percentage	7.625%
6.875% senior notes due 2022 [Member] | Senior notes [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term debt	$ 532,762	533,493
Debt Instrument, Interest Rate, Stated Percentage	6.875%
5.00% Senior Notes, Due 2025 [Member] | Senior notes [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Long-term debt	$ 486,073	0
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Senior revolving credit facility [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Short-term debt	$ 110,000	100,000
Short-term borrowings [Member]
Schedule of Long-term and Short-term Debt Instruments [Line Items]
Short-term debt	$ 30,304	$ 31,524