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Loss Per Share (Tables) | 3 Months Ended
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Mar. 31, 2013
Earnings Per Share [Abstract] |
Schedule of Loss Per Share, Basic and Diluted | 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 | )
Schedule of Antidilutive Securities Excluded from Computation of Loss Per Share |
| 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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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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