Derivatives - Summary of Primary Net Hedging Positions and Corresponding Fair Values (Detail) - Forward Exchange Contracts [Member] - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	$ 104.4	$ 154.7
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	2.2	(0.2)
U.S. Dollar/Japanese Yen [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	34.4	45.9
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	(0.2)	0.1
U.S. Dollar/South Korean Won [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	32.5	51.7
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	1.8	0.2
U.S. Dollar/Euro [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	10.1	15.7
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	0.4	0.2
U.S. Dollar/U.K. Pound Sterling [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	5.3	8.3
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	0.3	(0.2)
U.S. Dollar/Taiwan Dollar [Member]
Derivative [Line Items]
Currency Hedged (Buy/Sell), Gross Notional Value, Net	22.1	33.1
Currency Hedged (Buy/Sell), Fair Value, (Liability)/Asset, Net	$ (0.1)	$ (0.5)