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Supplemental Financial Information (Other Liabilities) (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014
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Supplemental Financial Information [Abstract] |  |
Deferred revenue | $ 265.8 | $ 373.2
Unrecognized tax benefits (inclusive of interest and penalties) | 143.8 | 142.4
Intangible liabilities | 21.2 | 40.7
Supplemental executive retirement plan liabilities | 46.3 | 45.1
Personnel costs | 15.3 | 26.1
Other | 34.2 | 39.8
Other liabilities | $ 526.6 | $ 667.3

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- Definition Supplemental Executive Retirement Plan Liabilities + References No definition available. + Details
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- Definition The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
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