The aggregate amount assigned to a major class of finite-lived intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination). 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 charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of dividends or interest. Give totals for each group. If operations of any controlled companies are different in character from those of the company, group such affiliates (1) within divisions and (2) by type of activities.

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Acquisitions (Details) (RELS Reporting Services, LLC [Member], USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended
	Jul. 31, 2012	Sep. 30, 2012	Sep. 30, 2012	Jun. 30, 2012
Business Acquisition [Line Items]
Cost of acquired entity	$ 3.0
Investments in and Advances to Affiliates, Dividends or Interest	1.5
Ownership percentage in equity method investment				50.10%
Asset impairment charges		1.2	1.2
Customer Lists [Member]
Business Acquisition [Line Items]
Acquired finite-lived intangible asset	$ 3.1
Acquired finite-lived ntangible asset, weighted average useful life	3