Restructuring - Costs by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	$ 4.3	$ 3.6
Enclosures
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	3.1	0.0
Thermal Management
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	1.1	2.0
Electrical & Fastening Solutions
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	0.0	0.9
Other
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	$ 0.1	$ 0.7