Acquisitions And Other Investments (Spider Purchase Price Allocation) (Details) (USD $) In Millions |
Dec. 31, 2010 |
Jul. 06, 2010 |
|---|---|---|
| Total consideration transferred including interest held prior to acquisition | $ (1.7) | |
Spider [Member] |
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| Total consideration transferred including interest held prior to acquisition | 56.9 | |
| Fair value of equity interest before acquisition | 51.9 | |
| Goodwill | $ 75.2 |
| X | ||||||||||
- Definition Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition This element represents the sum of the: (1) acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer and (2) the acquisition-date fair value of any equity interest in the acquiree held by the acquirer prior to the business combination (for example, a step acquisition). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition In a business combination achieved in stages, this element represents the acquisition-date fair value of the equity interest in the acquiree held by the acquirer immediately before the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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