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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following sets forth basic and diluted earnings per common share available to IPG common stockholders.
| Three months ended June 30, |  | Six months ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
Net income available to IPG common stockholders - basic and diluted | $ | 121.2 |  |  | $ | 99.4 |  |  | $ | 119.4 |  |  | $ | 78.5 |
Weighted-average number of common shares outstanding - basic | 410.5 |  |  | 421.1 |  |  | 410.8 |  |  | 421.9 |
Add: Effect of dilutive securities |  |  |  |  |  |  |
Restricted stock, stock options and other equity awards | 7.1 |  |  | 7.0 |  |  | 6.8 |  |  | 6.6 |
Weighted-average number of common shares outstanding - diluted | 417.6 |  |  | 428.1 |  |  | 417.6 |  |  | 428.5 |
Earnings per share available to IPG common stockholders - basic | $ | 0.30 |  |  | $ | 0.24 |  |  | $ | 0.29 |  |  | $ | 0.19 |
Earnings per share available to IPG common stockholders - diluted | $ | 0.29 |  |  | $ | 0.23 |  |  | $ | 0.29 |  |  | $ | 0.18 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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