v3.10.0.1
Restructuring Liability (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Restructuring Reserve [Roll Forward]    
Restructuring liability as of January 1, 2018 $ 37.7  
Restructuring charges 68.5  
Cash paid (39.7)  
Foreign currency translation adjustments (2.9)  
Restructuring liability as of June 30, 2018 63.6  
Current portion   $ 47.3
Noncurrent portion   16.3
Total 37.7 63.6
Employee severance and termination    
Restructuring Reserve [Roll Forward]    
Restructuring liability as of January 1, 2018 11.7  
Restructuring charges 22.2  
Cash paid (16.8)  
Foreign currency translation adjustments (0.4)  
Restructuring liability as of June 30, 2018 16.7  
Current portion   15.2
Noncurrent portion   1.5
Total 11.7 16.7
Office closures    
Restructuring Reserve [Roll Forward]    
Restructuring liability as of January 1, 2018 9.5  
Restructuring charges 4.5  
Cash paid (3.2)  
Foreign currency translation adjustments (0.3)  
Restructuring liability as of June 30, 2018 10.5  
Current portion   6.3
Noncurrent portion   4.2
Total 9.5 10.5
Contract termination and other    
Restructuring Reserve [Roll Forward]    
Restructuring liability as of January 1, 2018 16.5  
Restructuring charges 41.8  
Cash paid (19.7)  
Foreign currency translation adjustments (2.2)  
Restructuring liability as of June 30, 2018 36.4  
Current portion   25.8
Noncurrent portion   10.6
Total 16.5 $ 36.4
Contract termination and other | Belgium    
Restructuring Reserve [Roll Forward]    
Restructuring charges $ 39.2