Acquisitions, Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross	$ 322.9	$ 321.3
Accumulated Amortization	(208.2)	(200.4)
Intangible assets, Net	$ 114.7	$ 120.9
Weighted-Average Useful Life (years)	10 years	10 years
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	$ 31.2	$ 30.9
Accumulated Amortization	(28.0)	(27.4)
Intangible assets, Net	$ 3.2	$ 3.5
Weighted-Average Useful Life (years)	9 years	9 years
Customer Related Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	$ 152.8	$ 152.0
Accumulated Amortization	(100.0)	(97.7)
Intangible assets, Net	$ 52.8	$ 54.3
Weighted-Average Useful Life (years)	12 years	12 years
Supplier Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	$ 0.2	$ 0.2
Accumulated Amortization	(0.1)	(0.1)
Intangible assets, Net	$ 0.1	$ 0.1
Weighted-Average Useful Life (years)	20 years	20 years
Technology-Based Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	$ 133.6	$ 133.2
Accumulated Amortization	(76.8)	(72.1)
Intangible assets, Net	$ 56.8	$ 61.1
Weighted-Average Useful Life (years)	7 years	7 years
Non-competition Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	$ 5.1	$ 5.0
Accumulated Amortization	(3.3)	(3.1)
Intangible assets, Net	$ 1.8	$ 1.9
Weighted-Average Useful Life (years)	5 years	5 years