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Earnings Per Share (Notes) | 3 Months Ended
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Mar. 31, 2023
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | Earnings Per Share The following sets forth basic and diluted earnings per common share available to IPG common stockholders.
| Three Months Ended March 31, |  |
| 2023 |  | 2022 |  |  |  |
Net income available to IPG common stockholders | $ | 126.0 |  |  | $ | 159.4 |  |  |  |  |
Weighted-average number of common shares outstanding - basic | 385.8 |  |  | 394.5 |  |  |  |  |
Dilutive effect of stock options and restricted shares | 1.6 |  |  | 3.9 |  |  |  |  |
Weighted-average number of common shares outstanding - diluted | 387.4 |  |  | 398.4 |  |  |  |  |
Earnings per share available to IPG common stockholders: |  |  |  |  |  |  |
Basic | $ | 0.33 |  |  | $ | 0.40 |  |  |  |  |
Diluted | $ | 0.33 |  |  | $ | 0.40 |  |  |  |  |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI https://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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