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Net Income per Share (Tables) | 6 Months Ended
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Jun. 30, 2022
Net Income per Share [Abstract] |
Computations of Basic and Diluted Net Income per Share | The computations of basic and diluted net income per share were (in millions, except per share amounts):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Net Income - Omnicom Group Inc. | $ | 348.4 |  |  | $ | 348.2 |  |  | $ | 522.2 |  |  | $ | 636.0 |
Weighted Average Shares: |  |  |  |  |  |  |
Basic | 205.3 |  |  | 215.4 |  |  | 206.8 |  |  | 215.5 |
Dilutive stock options and restricted shares | 1.6 |  |  | 1.7 |  |  | 1.5 |  |  | 1.5 |
Diluted | 206.9 |  |  | 217.1 |  |  | 208.3 |  |  | 217.0 |
Anti-dilutive stock options and restricted shares | 4.4 |  |  | 0.7 |  |  | 4.4 |  |  | 0.7 |
Net Income per Share - Omnicom Group Inc.: |  |  |  |  |  |  |
Basic | $1.70 |  | $1.62 |  | $2.53 |  | $2.95
Diluted | $1.68 |  | $1.60 |  | $2.51 |  | $2.93

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- Definition Net Income per Share [Abstract] + References No definition available. + Details
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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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