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Business Combinations (Details 3) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Summary of unaudited consolidated pro forma results of operations |  |
Revenues | $ 19,905.7 | $ 19,128.7
Income from continuing operations | 331.4 | 311.9
Net income | $ 328.0 | $ 297.2
Income from continuing operations per diluted common share (in dollars per share) | $ 3.69 | $ 3.45
Net income per diluted common share (in dollars per share) | $ 3.65 | $ 3.29

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- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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