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Earnings Per Share Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders (Tables) | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Basic and Diluted Earnings Per Common Share Available to IPG Common Stockholders | The following sets forth basic and diluted earnings per common share available to IPG common stockholders.
| Years ended December 31,
| 2016 |  | 2015 |  | 2014
Net income available to IPG common stockholders | $ | 608.5 |  |  | $ | 454.6 |  |  | $ | 477.1 |
Weighted-average number of common shares outstanding - basic | 397.9 |  |  | 408.1 |  |  | 419.2 |
Add: Effect of dilutive securities |  |  |  |  |
Restricted stock, stock options and other equity awards | 10.1 |  |  | 7.6 |  |  | 6.2 |
Weighted-average number of common shares outstanding - diluted | 408.0 |  |  | 415.7 |  |  | 425.4 |
Earnings per share available to IPG common stockholders: |  |  |  |  |
Basic | $ | 1.53 |  |  | $ | 1.11 |  |  | $ | 1.14 |
Diluted | $ | 1.49 |  |  | $ | 1.09 |  |  | $ | 1.12 |

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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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