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Income Taxes - Summary of Open Tax Years by Major Jurisdiction Outside of the United States (Detail)
 12 Months Ended
Dec. 31, 2014
Earliest Tax Year [Member] | CHINA  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2002
Earliest Tax Year [Member] | FRANCE  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2010
Earliest Tax Year [Member] | GERMANY  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2008
Earliest Tax Year [Member] | INDIA  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 1997
Earliest Tax Year [Member] | Japan [Member]  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2011
Earliest Tax Year [Member] | United Kingdom [Member]  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2008
Latest Tax Year [Member] | CHINA  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2014
Latest Tax Year [Member] | FRANCE  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2014
Latest Tax Year [Member] | GERMANY  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2014
Latest Tax Year [Member] | INDIA  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2014
Latest Tax Year [Member] | Japan [Member]  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2014
Latest Tax Year [Member] | United Kingdom [Member]  
Income Tax Contingency [Line Items]  
Open tax years by major tax jurisdiction 2014