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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Unrecognized tax benefits would impact effective tax rate if recognized			$ 14.4
Unrecognized tax benefit		$ 14.0	16.4	$ 14.0	$ 2.5	$ 2.3
Uncertain tax positions			$ 2.4	12.1
Income tax examination, description			The Company and its U.S. subsidiaries remain open to examination by the IRS for years 2016 onwards. The Company’s subsidiaries in foreign tax jurisdictions are open to examination including Spain (2015 onwards), France (2016 onwards), Germany (2016 onwards), Switzerland (2017 onwards) and the United Kingdom (2018 onwards).
Cash payments for income taxes			$ 37.6	35.4	24.2
Operating loss carry forwards			33.7
Deferred tax assets valuation allowance		0.0	0.8	0.0
Deferred tax assets operating loss carry forwards net of valuation allowance			7.3
Operating Loss Carryforwards expected to relieved			26.4
Italian Tax Authorities [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefit		0.9	1.0	0.9
Income tax interest expense			0.5	0.3	$ 0.2
Italian Tax Authorities [Member] | Purchase And Sale Agreement [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits would impact effective tax rate if recognized			3.4
Italian Tax Authorities [Member] | Current And All the Previous Periods [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefit		0.5		$ 0.5
Tax Cuts and Jobs Act [Member]
Income Tax Contingency [Line Items]
Income tax interest expense			0.9
Uncertain tax positions		$ 10.8
State [Member]
Income Tax Contingency [Line Items]
Operating loss carry forwards			3.8
Foreign [Member]
Income Tax Contingency [Line Items]
Operating loss carry forwards			$ 29.8
Italy [Member] | Earliest Tax Year [Member]
Income Tax Contingency [Line Items]
Open tax year			2011
Italy [Member] | Latest Tax Year [Member]
Income Tax Contingency [Line Items]
Open tax year	2014		2013
France [Member] | Ministry of Economic Affairs and Finance, Italy | Tax Year 2016
Income Tax Contingency [Line Items]
Open tax year			2016
France [Member] | Ministry of Economic Affairs and Finance, Italy | Tax Year 2018
Income Tax Contingency [Line Items]
Open tax year			2018
United States [Member]
Income Tax Contingency [Line Items]
Operating loss carry forwards			$ 3.9
Operating loss carryforward without expiration			$ 0.1

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