Goodwill and Other Intangible Assets, Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Intangible assets
Indefinite-lived trade name intangible asset	$ 186.1	$ 186.1
Gross Carrying Amount	531.4	521.8
Accumulated Amortization	257.8	233.5
Net Carrying Amount	$ 273.6	288.3
Weighted average useful lives of acquired amortizable intangible assets	10 years
Customer relationships
Intangible assets
Gross Carrying Amount	$ 390.0	381.1
Accumulated Amortization	178.6	159.1
Net Carrying Amount	$ 211.4	222.0
Weighted average useful lives of acquired amortizable intangible assets	10 years
Proprietary technology
Intangible assets
Gross Carrying Amount	$ 107.4	106.7
Accumulated Amortization	45.7	40.9
Net Carrying Amount	$ 61.7	65.8
Weighted average useful lives of acquired amortizable intangible assets	11 years
Backlog and other
Intangible assets
Gross Carrying Amount	$ 34.0	34.0
Accumulated Amortization	33.5	33.5
Net Carrying Amount	$ 0.5	$ 0.5
Weighted average useful lives of acquired amortizable intangible assets	2 years