Segments, Concentrations and Geographic Information - Reconciliation of Segment Assets to Consolidated Assets (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	$ 23.1	$ 30.6	$ 71.0	$ 92.3
Total assets	3,617.9	4,161.2	3,617.9	4,161.2	$ 4,130.6
Corporate [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	0.6	0.6	1.8	2.0
Total assets	116.0	134.1	116.0	134.1
Power Transmission Technologies [Member] | Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	6.8	7.8	21.3	23.8
Total assets	1,039.2	1,064.3	1,039.2	1,064.3
Automation & Specialty [Member] | Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	15.7	22.2	47.9	66.5
Total assets	$ 2,462.7	$ 2,962.8	$ 2,462.7	$ 2,962.8