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Business Combinations (Details 3) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Summary of unaudited consolidated pro forma results of operations |  |  |  |
Revenues | $ 4,409.2 | $ 4,076.7 | $ 8,498.0 | $ 7,888.1
Income from continuing operations | 80.3 | 74.2 | 146.5 | 143.4
Net income | $ 72.9 | $ 73.1 | $ 140.4 | $ 142.6
Income from continuing operations per diluted common share (in dollars per share) | $ 0.89 | $ 0.82 | $ 1.62 | $ 1.59
Net income per diluted common share (in dollars per share) | $ 0.81 | $ 0.81 | $ 1.55 | $ 1.58

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