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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, 2021
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,
| 2021 |  | 2020 |  | 2019
Net income available to IPG common stockholders | $ | 952.8 |  |  | $ | 351.1 |  |  | $ | 656.0 |
Weighted-average number of common shares outstanding - basic | 393.0 |  |  | 389.4 |  |  | 386.1 |
Dilutive effect of stock options and restricted shares | 5.4 |  |  | 3.8 |  |  | 5.1 |
Weighted-average number of common shares outstanding - diluted | 398.4 |  |  | 393.2 |  |  | 391.2 |
Earnings per share available to IPG common stockholders: |  |  |  |  |
Basic | $ | 2.42 |  |  | $ | 0.90 |  |  | $ | 1.70 |
Diluted | $ | 2.39 |  |  | $ | 0.89 |  |  | $ | 1.68 |

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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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