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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, 2024
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,
| 2024 |  | 2023 |  | 2022
Net income available to IPG common stockholders | $ | 689.5 |  |  | $ | 1,098.4 |  |  | $ | 938.0 |
Weighted-average number of common shares outstanding - basic | 375.2 |  |  | 384.1 |  |  | 391.5 |
Dilutive effect of stock options and restricted shares | 2.5 |  |  | 1.8 |  |  | 3.6 |
Weighted-average number of common shares outstanding - diluted | 377.7 |  |  | 385.9 |  |  | 395.1 |
Earnings per share available to IPG common stockholders: |  |  |  |  |
Basic | $ | 1.84 |  |  | $ | 2.86 |  |  | $ | 2.40 |
Diluted | $ | 1.83 |  |  | $ | 2.85 |  |  | $ | 2.37 |

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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