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Loss Per Share (Notes) | 3 Months Ended
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Mar. 31, 2013
Earnings Per Share [Abstract] |
Loss Per Share | Loss Per Share The following sets forth basic and diluted loss per common share available to IPG common stockholders.
| Three months ended March 31,
| 2013 |  | 2012
Net loss available to IPG common stockholders | $ | (59.2 | ) |  | $ | (45.9 | )
Weighted-average number of common shares outstanding - basic and diluted | 414.2 |  |  | 437.6 |
Loss per share available to IPG common stockholders - basic and diluted | $ | (0.14 | ) |  | $ | (0.10 | )
Basic and diluted shares outstanding and loss per share are equal for the three months ended March 31, 2013 and 2012 because our potentially dilutive securities are antidilutive as a result of the net loss available to IPG common stockholders in each period presented. The following table presents the potential shares excluded from the diluted loss per share calculation because the effect of including these potential shares would be antidilutive.
| Three months ended March 31,
| 2013 |  | 2012
Restricted stock, stock options and other equity awards | 5.7 |  |  | 6.3 |
4.75% Notes 1 | 13.4 |  |  | 16.5 |
4.25% Notes 1 | 0.0 |  |  | 30.9 |
Preferred stock outstanding | 17.1 |  |  | 16.7 |
Total | 36.2 |  |  | 70.4 |
Securities excluded from the diluted loss per share calculation because the exercise price was greater than the average market price: |  |  |
Stock options 2 | 3.2 |  |  | 7.2 |
1 | We retired all of our outstanding 4.75% Notes and 4.25% Notes in March 2013 and March 2012, respectively. See Note 2 for further information on our 4.75% Notes. For purposes of calculating diluted loss per share, the potentially dilutive shares are pro-rated based on the period they were outstanding.
2 | These options are outstanding at the end of the respective periods. In any period in which the exercise price is less than the average market price, these options have the potential to be dilutive, and application of the treasury stock method would reduce this amount.

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