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Earnings Per Share (Notes) | 9 Months Ended
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Sep. 30, 2019
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 September 30, |  | Nine months ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Net income available to IPG common stockholders | $ | 165.6 |  |  | $ | 161.0 |  |  | $ | 327.1 |  |  | $ | 292.7 |
Weighted-average number of common shares outstanding - basic | 386.7 |  |  | 382.6 |  |  | 385.8 |  |  | 383.2 |
Dilutive effect of stock options and restricted shares | 5.1 |  |  | 5.8 |  |  | 4.5 |  |  | 5.2 |
Weighted-average number of common shares outstanding - diluted | 391.8 |  |  | 388.4 |  |  | 390.3 |  |  | 388.4 |
Earnings per share available to IPG common stockholders: |  |  |  |  |  |  |
Basic | $ | 0.43 |  |  | $ | 0.42 |  |  | $ | 0.85 |  |  | $ | 0.76 |
Diluted | $ | 0.42 |  |  | $ | 0.41 |  |  | $ | 0.84 |  |  | $ | 0.75 |

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- References No definition available. + Details
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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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