The following sets forth basic and diluted earnings per common share available to IPG common stockholders. | | | | | | | | | | Three months ended
March 31, | | 2017 | | 2016 | Net income available to IPG common stockholders | $ | 21.5 |
| | $ | 5.4 |
| | | | | Weighted-average number of common shares outstanding - basic | 391.7 |
| | 400.6 |
| Add: Effect of dilutive securities | | | | Restricted stock, stock options and other equity awards | 7.6 |
| | 8.7 |
| Weighted-average number of common shares outstanding - diluted | 399.3 |
| | 409.3 |
| | | | | Earnings per share available to IPG common stockholders: | | | | Basic | $ | 0.05 |
| | $ | 0.01 |
| Diluted | $ | 0.05 |
| | $ | 0.01 |
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