Goodwill and Other Intangible Assets (Details 2) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Components of amortized intangible assets
Gross Carrying Amount	$ 310.7		$ 306.5
Accumulated Amortization	(161.7)		(151.3)
Amortization expense for intangible assets	8.4	$ 7.5
Estimated amortization expense
Remainder of fiscal year	8.4
2018	16.8
2019	16.7
2020	15.8
2021	13.7
2022	12.2
Contract based
Components of amortized intangible assets
Gross Carrying Amount	9.3		8.9
Accumulated Amortization	(1.2)		(1.0)
Technology based
Components of amortized intangible assets
Gross Carrying Amount	79.8		79.5
Accumulated Amortization	(54.4)		(52.0)
Marketing related
Components of amortized intangible assets
Gross Carrying Amount	14.1		14.2
Accumulated Amortization	(9.1)		(8.9)
Customer based
Components of amortized intangible assets
Gross Carrying Amount	207.5		203.9
Accumulated Amortization	$ (97.0)		$ (89.4)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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