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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Income Tax Contingency [Line Items]    
Unrecognized tax benefits would impact effective tax rate if recognized $ 16.3  
Unrecognized tax benefit $ 16.3 $ 16.0
Income tax examination, description The Company and its U.S. subsidiaries remain open to examination by the IRS for years 2017 onwards under the statute of limitations. The Company’s subsidiaries in foreign tax jurisdictions are open to examination including Germany (2016 onwards), Switzerland (2016 onwards), Spain (2016 onwards), France (2018 onwards) and the United Kingdom (2018 onwards).  
Increase to income tax expense $ 0.3  
Foreign exchange movements 0.1  
Italian Tax Authorities [Member]    
Income Tax Contingency [Line Items]    
Unrecognized tax benefit 3.4  
Italian Tax Authorities [Member] | Interest Accrued [Member]    
Income Tax Contingency [Line Items]    
Unrecognized tax benefit 0.1  
United States [Member]    
Income Tax Contingency [Line Items]    
Unrecognized tax benefit $ 12.7  
Non-US [Member] | Earliest Tax Year [Member]    
Income Tax Contingency [Line Items]    
Open tax year 2011  
Non-US [Member] | Latest Tax Year [Member]    
Income Tax Contingency [Line Items]    
Open tax year 2014  
Non-US [Member] | Historical Impairment Of Subsidiaries [Member]    
Income Tax Contingency [Line Items]    
Other Non Significant Items Inclusive Of Interest And Penalties $ 0.2