Impairment and Restructuring Charges - Restructuring Charges by Segment (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Impairment charges	$ 1.1			$ 4.5	$ 0.1
Severance and related benefit costs	0.1		$ 3.2	0.6	5.9
Exit costs	0.1		(0.1)	0.2	0.7
Total	1.3		3.1	5.3	6.7
Mobile Industries
Restructuring Cost and Reserve [Line Items]
Impairment charges	1.0			1.1	0.0
Severance and related benefit costs	0.0		1.5	0.0	1.6
Exit costs	0.1		(0.3)	0.2	0.3
Total	1.1		1.2	1.3	1.9
Process Industries
Restructuring Cost and Reserve [Line Items]
Impairment charges	0.1	$ 3.3		3.4	0.1
Severance and related benefit costs	0.1		1.7	0.6	4.2
Exit costs	0.0		0.2	0.0	0.4
Total	0.2		1.9	4.0	4.7
Corporate Segment
Restructuring Cost and Reserve [Line Items]
Impairment charges	0.0			0.0	0.0
Severance and related benefit costs	0.0		0.0	0.0	0.1
Exit costs	0.0		0.0	0.0	0.0
Total	$ 0.0		$ 0.0	$ 0.0	$ 0.1