Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,000.0	$ 906.3	$ 1,979.7	$ 1,789.4
Segment EBIT:
Total EBIT for reportable segments	162.1	145.1	329.7	277.8
Unallocated corporate expenses	(15.4)	(15.2)	(29.7)	(29.3)
Interest expense	(19.3)	(10.7)	(37.3)	(20.7)
Investment Income, Interest	1.1	0.5	2.4	0.9
Income (Loss) Before Income Taxes	128.5	122.1	265.1	230.9
Mobile Industries [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	493.7	489.1	993.7	977.6
Segment EBIT:
Total EBIT for reportable segments	59.1	54.5	120.5	105.6
Process Industries [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	506.3	417.2	986.0	811.8
Segment EBIT:
Total EBIT for reportable segments	$ 103.0	$ 90.6	$ 209.2	$ 172.2