Segments, Concentrations and Geographic Information - Segment Financial Information and Reconciliation of Segments Revenue to Unaudited Condensed Consolidated Revenue (Detail) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 498.1		$ 488.6		$ 1,009.8	$ 960.7
Income from operations	63.7		65.5		131.3	130.6
Restructuring costs	(0.5)	$ (0.4)	(0.8)	$ (0.9)	(0.9)	(1.7)
Net interest expense	11.8		16.5		23.1	33.4
Other non-operating income, net	(1.9)		(1.7)		(2.0)	(3.2)
Total other non-operating (income) expense, net	9.9		14.8		21.1	30.2
Income before income taxes	53.8		50.7		110.2	100.4
Provision for income taxes	27.5		9.9		39.1	20.4
Net income	26.3		40.8		71.1	80.0
Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Restructuring costs	(0.5)		(0.8)		(0.9)	(1.7)
Operating Segments [Member] | Power Transmission Technologies [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	252.5		237.6		506.2	458.6
Income from operations	37.5		33.6		69.8	61.4
Restructuring costs	(0.1)		(0.4)		(0.1)	(1.0)
Operating Segments [Member] | Automation & Specialty [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	247.3		252.0		506.5	504.1
Income from operations	32.1		37.4		67.7	78.8
Restructuring costs	(0.4)		(0.4)		(0.8)	(0.7)
Intersegment Eliminations [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	(1.7)		(1.0)		(2.9)	(2.0)
Corporate Expenses [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Income from operations	$ 5.4		$ (4.7)		$ (5.3)	$ (7.9)