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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Income Tax Contingency [Line Items]    
Income tax examination, description The Company and its U.S. subsidiaries remain open to examination by the IRS for years 2012 onwards. The Company’s subsidiaries in foreign tax jurisdictions are open to examination including France (2013 onwards), Germany (2010 onwards), Switzerland (2013 onwards) and the United Kingdom (2013 onwards).  
Unremitted earnings   $ 743
France [Member]    
Income Tax Contingency [Line Items]    
Open tax year 2013  
Germany [Member]    
Income Tax Contingency [Line Items]    
Open tax year 2010  
Switzerland [Member]    
Income Tax Contingency [Line Items]    
Open tax year 2013  
United Kingdom [Member]    
Income Tax Contingency [Line Items]    
Open tax year 2013