Income Taxes - Details of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Stock compensation	$ 3.7	$ 3.7
Net operating loss carry forwards	9.2	10.9
Other intangible assets	8.7	10.5
Accretion expense	3.2	3.2
Restructuring provision	1.6	1.7
Employee related liabilities	7.3	8.1
Foreign tax credits	1.7	0.8
Operating lease liabilities	12.6	11.8
Inventory provisions	6.5	6.6
Research and experimental expenditure	5.3	2.7
Other	5.3	4.8
Subtotal	65.1	64.8
Less valuation allowance	(0.1)	(0.7)
Total net deferred tax assets	65.0	64.1
Deferred tax liabilities:
Property, plant and equipment	(24.8)	(22.5)
Intangible assets including goodwill	(31.2)	(30.3)
Pension asset	(7.6)	(10.9)
Customer relationships	(5.1)	(3.4)
Unremitted overseas earnings	(4.4)	(1.9)
Right-of-use assets	(12.5)	(11.8)
Other	(2.5)	(3.6)
Total deferred tax liabilities	(88.1)	(84.4)
Net deferred tax liability	(23.1)	(20.3)
Deferred tax assets	10.4	5.9
Deferred tax liabilities	(33.5)	(26.2)
Net deferred tax liability	$ (23.1)	$ (20.3)