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Individual Components of Work Force Reduction and Idle Lease Cost (Detail)
$ in Millions
 9 Months Ended
Sep. 30, 2015
USD ($)
Employee
Restructuring Cost and Reserve [Line Items]  
Headcount | Employee 165
Charges for work-force reductions $ 52.3
Utilized (28.3)
Translation adjustments (0.9)
Balance at Sept. 30, 2015 $ 23.1
Remaining Of Current Year  
Restructuring Cost and Reserve [Line Items]  
Headcount | Employee 151
Expected future utilization $ 18.4
Beyond 2015  
Restructuring Cost and Reserve [Line Items]  
Headcount | Employee 14
Expected future utilization $ 4.7
Workforce Reductions  
Restructuring Cost and Reserve [Line Items]  
Headcount | Employee 1,233
Workforce Reductions | United States  
Restructuring Cost and Reserve [Line Items]  
Charges for work-force reductions $ 28.1
Utilized (14.2)
Balance at Sept. 30, 2015 13.9
Workforce Reductions | Non-US  
Restructuring Cost and Reserve [Line Items]  
Charges for work-force reductions 24.2
Utilized (14.1)
Translation adjustments (0.9)
Balance at Sept. 30, 2015 9.2
Workforce Reductions | Remaining Of Current Year | United States  
Restructuring Cost and Reserve [Line Items]  
Expected future utilization 10.9
Workforce Reductions | Remaining Of Current Year | Non-US  
Restructuring Cost and Reserve [Line Items]  
Expected future utilization 7.5
Workforce Reductions | Beyond 2015 | United States  
Restructuring Cost and Reserve [Line Items]  
Expected future utilization 3.0
Workforce Reductions | Beyond 2015 | Non-US  
Restructuring Cost and Reserve [Line Items]  
Expected future utilization $ 1.7
Amount Fully Utilized  
Restructuring Cost and Reserve [Line Items]  
Headcount | Employee (1,068)