Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 914.0	$ 881.3	$ 2,893.7	$ 2,670.7
Segment EBIT:
Total EBIT for reportable segments	147.6	132.4	477.3	410.2
Unallocated corporate expenses	(11.4)	(17.9)	(41.1)	(47.2)
Interest expense	(18.2)	(12.5)	(55.5)	(33.2)
Investment Income, Interest	1.1	0.6	3.5	1.5
Income (Loss) Before Income Taxes	102.2	97.3	367.3	328.2
Mobile Industries [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	455.1	464.2	1,448.8	1,441.8
Segment EBIT:
Total EBIT for reportable segments	52.0	50.6	172.5	156.2
Process Industries [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	458.9	417.1	1,444.9	1,228.9
Segment EBIT:
Total EBIT for reportable segments	$ 95.6	$ 81.8	$ 304.8	$ 254.0