Derivative Financial Instruments - Fair Values of Derivative Forward Contract Instruments (Detail) - Foreign Exchange Forward - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Other Assets
Derivatives, Fair Value [Line Items]
Gross amount of recognized assets	$ 1.0	$ 0.2
Gross amount of offset	(0.9)	(0.2)
Net amount of assets presented in the consolidated balance sheets	0.1	0.0
Accounts Payable and Other Liabilities
Derivatives, Fair Value [Line Items]
Gross amount of recognized liabilities	3.1	1.0
Gross amount of offset	(0.9)	(0.2)
Net amount of liabilities presented in the consolidated balance sheets	$ 2.2	$ 0.8

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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