Acquisitions, Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross	$ 592.0	$ 610.9
Accumulated Amortization	(285.8)	(277.5)
Intangible assets, Net	$ 306.2	$ 333.4
Weighted-Average Useful Life (years)	9 years	10 years
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Gross	$ 65.6	$ 69.3
Accumulated Amortization	35.9	35.2
Intangible assets, Net	$ 29.7	$ 34.1
Weighted-Average Useful Life (years)	8 years	8 years
Customer-related assets
Finite-Lived Intangible Assets [Line Items]
Gross	$ 362.0	$ 377.9
Accumulated Amortization	(134.3)	(130.3)
Intangible assets, Net	$ 227.7	$ 247.6
Weighted-Average Useful Life (years)	11 years	11 years
Intellectual property & other
Finite-Lived Intangible Assets [Line Items]
Gross	$ 164.4	$ 163.7
Accumulated Amortization	(115.6)	(112.0)
Intangible assets, Net	$ 48.8	$ 51.7
Weighted-Average Useful Life (years)	7 years	7 years