Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Components of amortized intangible assets
Gross Carrying Amount	$ 334.8		$ 339.4
Accumulated Amortization	(129.0)		(116.9)
Amortization expense for intangible assets	13.9	13.7
Estimated amortization expense
Remainder of 2012	4.4
2013	17.7
2014	16.9
2015	16.6
2016	16.6
2017	16.6
Contract based
Components of amortized intangible assets
Gross Carrying Amount	21.0		20.8
Accumulated Amortization	(13.7)		(13.6)
Technology based
Components of amortized intangible assets
Gross Carrying Amount	91.3		91.3
Accumulated Amortization	(39.5)		(35.3)
Marketing related
Components of amortized intangible assets
Gross Carrying Amount	25.0		26.3
Accumulated Amortization	(14.3)		(13.9)
Customer based
Components of amortized intangible assets
Gross Carrying Amount	197.5		201.0
Accumulated Amortization	$ (61.5)		$ (54.1)

The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Aggregate amount of intangible asset amortization recognized as expense during the period.

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Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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The amount of amortization expense expected to be recognized during the remainder of the current fiscal year.

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The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.

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The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years.

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The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.

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The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.

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The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years.

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