Goodwill and Intangible Assets - By Major Asset Class (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Line Items]
Original Cost	$ 334.9	$ 338.0
Accumulated Amortization	110.7	106.7
Net Book Value	224.2	231.3
Customer contracts and relationships
Goodwill and Intangible Assets Disclosure [Line Items]
Original Cost	129.8	129.4
Accumulated Amortization	24.0	20.1
Net Book Value	$ 105.8	109.3
Customer contracts and relationships | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	13 years
Customer contracts and relationships | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	23 years
Acquired technologies and other
Goodwill and Intangible Assets Disclosure [Line Items]
Original Cost	$ 148.3	150.0
Accumulated Amortization	66.6	65.3
Net Book Value	$ 81.7	84.7
Acquired technologies and other | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	5 years
Acquired technologies and other | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	34 years
Trade names
Goodwill and Intangible Assets Disclosure [Line Items]
Original Cost	$ 28.7	29.0
Accumulated Amortization	4.9	4.0
Net Book Value	$ 23.8	25.0
Trade names | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	5 years
Trade names | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	20 years
Trademarks and patents
Goodwill and Intangible Assets Disclosure [Line Items]
Original Cost	$ 25.8	27.1
Accumulated Amortization	13.9	16.3
Net Book Value	$ 11.9	10.8
Trademarks and patents | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	3 years
Trademarks and patents | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	20 years
Covenants not to compete
Goodwill and Intangible Assets Disclosure [Line Items]
Original Cost	$ 2.3	2.5
Accumulated Amortization	1.3	1.0
Net Book Value	$ 1.0	$ 1.5
Covenants not to compete | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	3 years
Covenants not to compete | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Useful Life (years)	5 years