Segments, Concentrations and Geographic Information - Reconciliation of Segment Assets to Consolidated Assets (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	$ 23.7	$ 31.0	$ 47.9	$ 61.7
Total assets	3,694.2	4,211.9	3,694.2	4,211.9	$ 4,130.6
Corporate [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	0.6	0.7	1.2	1.4
Total assets	106.4	160.2	106.4	160.2
Power Transmission Technologies [Member] | Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	7.1	8.0	14.5	16.0
Total assets	1,065.6	1,070.5	1,065.6	1,070.5
Automation & Specialty [Member] | Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total depreciation and amortization	16.0	22.3	32.2	44.3
Total assets	$ 2,522.2	$ 2,981.2	$ 2,522.2	$ 2,981.2