Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Components of amortized intangible assets
Gross Carrying Amount	$ 296.4	$ 331.9
Accumulated Amortization	(127.8)	(141.3)
Amortization of Intangible Assets	15.4us-gaap_AmortizationOfIntangibleAssets	15.5us-gaap_AmortizationOfIntangibleAssets	17.8us-gaap_AmortizationOfIntangibleAssets
Estimated amortization expense
2015	15.4
2016	15.2
2017	15.2
2018	15.2
2019	14.9
Contract based
Components of amortized intangible assets
Gross Carrying Amount	10.7	26.2
Accumulated Amortization	(1.2)	(14.4)
Technology [Member]
Components of amortized intangible assets
Gross Carrying Amount	81.0	82.6
Accumulated Amortization	(43.9)	(40.9)
Marketing related
Components of amortized intangible assets
Gross Carrying Amount	16.3	23.0
Accumulated Amortization	(9.1)	(14.2)
Customer based
Components of amortized intangible assets
Gross Carrying Amount	188.4	200.1
Accumulated Amortization	$ (73.6)	$ (71.8)

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 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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.

+ References