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Net Income per Share | 9 Months Ended
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Sep. 30, 2024
Net Income per Share [Abstract] |
Net Income per Share | Net Income per Share Basic and diluted net income per share:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2024 |  | 2023 |  | 2024 |  | 2023
Net Income - Omnicom Group Inc. | $ | 385.9 |  |  | $ | 371.9 |  |  | $ | 1,032.6 |  |  | $ | 965.7 |
Weighted Average Shares (millions): |  |  |  |  |  |  |
Basic | 195.6 |  |  | 198.1 |  |  | 196.5 |  |  | 199.7 |
Dilutive stock options and restricted shares | 2.6 |  |  | 1.8 |  |  | 2.4 |  |  | 2.3 |
Diluted | 198.2 |  |  | 199.9 |  |  | 198.9 |  |  | 202.0 |
Net Income per Share - Omnicom Group Inc.: |  |  |  |  |  |  |
Basic | $1.97 |  | $1.88 |  | $5.25 |  | $4.84
Diluted | $1.95 |  | $1.86 |  | $5.19 |  | $4.78

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-3 + Details
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