Goodwill and Other Intangible Assets (Goodwill and Intangible Assets Rollforward) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Beginning balance	$ 0us-gaap_Goodwill	$ 0us-gaap_Goodwill
Acquisitions of businesses	168.9us-gaap_GoodwillAcquiredDuringPeriod	0us-gaap_GoodwillAcquiredDuringPeriod
Ending balance	168.9us-gaap_Goodwill	0us-gaap_Goodwill	0us-gaap_Goodwill
Finite-lived Intangible Assets [Roll Forward]
Beginning balance	20.7	16.9
Acquisitions of businesses	188.9	5.2
Goodwill and intangible assets	366.4	20.7
Dispositions of businesses	(0.4)
Amortization, including foreign currency translation	(11.7)us-gaap_AmortizationOfIntangibleAssets	(1.4)us-gaap_AmortizationOfIntangibleAssets	(1.2)us-gaap_AmortizationOfIntangibleAssets
Ending balance	$ 197.5	$ 20.7	$ 16.9

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.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.

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No definition available.

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- Definition

Disposition of Goodwill through disposition of business

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