Revenue Recognition - Disaggregates Revenue for Each Reportable Segment and Geographic Region (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total net sales	$ 498.1	$ 488.6	$ 1,009.8	$ 960.7
North America (primarily U.S.) [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	280.8	255.5	572.1	502.5
Europe Excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	93.2	90.3	186.6	175.2
Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	55.1	50.5	111.5	101.5
China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	39.3	64.0	81.2	128.1
Asia and Other Excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	29.7	28.3	58.4	53.4
Operating Segments [Member] | Power Transmission Technologies [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	252.5	237.6	506.2	458.6
Operating Segments [Member] | Automation & Specialty [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	247.3	252.0	506.5	504.1
Intersegment Eliminations [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	$ (1.7)	$ (1.0)	$ (2.9)	$ (2.0)