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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2025
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,
| 2025 |  | 2024 |  | 2025 |  | 2024
Net income available to IPG common stockholders | $ | 162.5 |  |  | $ | 214.5 |  |  | $ | 77.1 |  |  | $ | 324.9 |
Weighted-average number of common shares outstanding - basic | 367.9 |  |  | 376.3 |  |  | 370.2 |  |  | 377.4 |
Dilutive effect of stock options and restricted shares | 2.2 |  |  | 2.4 |  |  | 2.3 |  |  | 2.3
Weighted-average number of common shares outstanding - diluted | 370.1 |  |  | 378.7 |  |  | 372.5 |  | 379.7
Earnings per share available to IPG common stockholders: |  |  |  |  |  |  |
Basic | $ | 0.44 |  |  | $ | 0.57 |  |  | $ | 0.21 |  |  | $ | 0.86 |
Diluted | $ | 0.44 |  |  | $ | 0.57 |  |  | $ | 0.21 |  |  | $ | 0.86 |

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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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