Segments, Concentrations and Geographic Information - Reconciliation of Segment Assets to Consolidated Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	$ 24.2	$ 30.7
Total assets	4,124.8	4,167.5	$ 4,130.6
Corporate [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	0.6	0.7
Total assets	145.4	140.7
Power Transmission Technologies [Member] | Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	7.4	8.0
Total assets	1,085.6	1,059.9
Automation & Specialty [Member] | Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	16.2	22.0
Total assets	$ 2,893.8	$ 2,966.9