Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of amortized intangible assets
Gross Carrying Amount	$ 334.3	$ 339.4
Accumulated Amortization	(133.1)	(116.9)
Amortization of Intangible Assets	18.1	18.1	18.9
Estimated amortization expense
2013	17.6
2014	17.5
2015	16.7
2016	16.5
2017	16.5
Contract based
Components of amortized intangible assets
Gross Carrying Amount	21.0	20.8
Accumulated Amortization	(13.8)	(13.6)
Technology [Member]
Components of amortized intangible assets
Gross Carrying Amount	91.3	91.3
Accumulated Amortization	(40.8)	(35.3)
Marketing related
Components of amortized intangible assets
Gross Carrying Amount	24.9	26.3
Accumulated Amortization	(14.4)	(13.9)
Customer based
Components of amortized intangible assets
Gross Carrying Amount	197.1	201.0
Accumulated Amortization	$ (64.1)	$ (54.1)

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 Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

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

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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

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

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-Name Accounting Standards Codification

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Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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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