Restructuring Charges (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Aug. 31, 2016
USD ($)
Aug. 31, 2015
USD ($)
Aug. 31, 2016
USD ($)
positions
Aug. 31, 2015
USD ($)
Restructuring Cost and Reserve [Line Items]        
Restructuring reserve payable in next 12 months $ 10.4   $ 10.4  
Restructuring charges 10.6 $ 1.9 $ 23.9 $ 22.0
Restructuring charges, number of positions eliminated | positions     327  
Restructuring Reserve [Roll Forward]        
Balance at November 30, 2015     $ 14.8  
Add: Restructuring costs incurred     24.5  
Revision to prior estimates     (0.6)  
Less: Amount paid     (25.4)  
Balance at August 31, 2016 13.3   13.3  
Employee Severance [Member]        
Restructuring Reserve [Roll Forward]        
Balance at November 30, 2015     8.5  
Add: Restructuring costs incurred     20.6  
Revision to prior estimates     (0.1)  
Less: Amount paid     (23.2)  
Balance at August 31, 2016 5.8   5.8  
Contract Termination [Member]        
Restructuring Reserve [Roll Forward]        
Balance at November 30, 2015     6.2  
Add: Restructuring costs incurred     3.9  
Revision to prior estimates     (0.5)  
Less: Amount paid     (2.2)  
Balance at August 31, 2016 7.4   7.4  
Other Restructuring Charges [Member]        
Restructuring Reserve [Roll Forward]        
Balance at November 30, 2015     0.1  
Add: Restructuring costs incurred     0.0  
Revision to prior estimates     0.0  
Less: Amount paid     0.0  
Balance at August 31, 2016 0.1   0.1  
Resources Segment [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges     12.7  
Restructuring Reserve [Roll Forward]        
Balance at August 31, 2016 6.6   6.6  
Transportation Segment [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges     4.8  
Restructuring Reserve [Roll Forward]        
Balance at August 31, 2016 4.0   4.0  
CMS Segment [Member]        
Restructuring Cost and Reserve [Line Items]        
Restructuring charges     6.5  
Restructuring Reserve [Roll Forward]        
Balance at August 31, 2016 $ 2.6   $ 2.6