Property, Plant and Equipment, Schedule of Significant Acquisitions and Disposals (Details)  | 
6 Months Ended | 
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| 
 May 31, 2016  
yr 
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| Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 1 | 30.00% | 
| Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 2 | 30.00% | 
| Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 3 | 20.00% | 
| Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 4 | 5 | 
| X | ||||||||||
- Definition Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 4 No definition available. 
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| X | ||||||||||
- Definition Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 2 No definition available. 
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| X | ||||||||||
- Definition Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 1 No definition available. 
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| X | ||||||||||
- Definition Property And Equipment Property, Plant And Equipment, Schedule Of Significant Acquisitions And Disposals 3 No definition available. 
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