Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
U.S. federal income tax rate		21.00%	21.00%	35.00%
Tax Cuts and Jobs Act of 2017, provisional income tax expense	$ 19.8
Tax Cuts and Jobs Act of 2017, provisional transition tax	18.0
Tax Cuts and Jobs Act of 2017, income tax expense related to remeasurement of deferred tax assets and liabilities	1.8
Tax Cuts and Jobs Act of 2017, differences of Non-U.S. subsidiaries offset by foreign tax credits		$ 1.9
Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Foreign Tax Credits Related to Differences of Non-U.S. Subsidiaries		0.7
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Adjustment During the Period		2.0
Tax Cuts And Jobs Act Of 2017 Incomplete Accounting Revaluation of Deferred Taxes Adjustment During the Period		2.5
Tax Cuts And Jobs Act Of 2017, Revaluation of Prepaid Taxes, Adjustment During the Period		2.0
Net operating loss carryforwards		$ 30.2
Net operating loss carryforwards, expiration term (at least)		6 years
Change in valuation allowance		$ 0.8
Recognized tax benefits	5.2	2.2	$ 5.2
Liability for interest expense and penalties accrued	$ 3.3	0.5	3.3
International
Segment Reporting Information [Line Items]
Charges associated with exit taxes			$ 2.5
Americas
Segment Reporting Information [Line Items]
Charges associated with exit taxes		$ 1.8