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Loss Per Share (Notes)
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
  Loss Per Share
The following sets forth basic and diluted loss per common share available to IPG common stockholders.
 
Three months ended
March 31,
 
2015
 
2014
Net loss available to IPG common stockholders - basic and diluted
$
(1.8
)
 
$
(20.9
)
Weighted-average number of common shares outstanding - basic and diluted
411.1

 
422.8

Loss per share available to IPG common stockholders - basic and diluted
$
0.00

 
$
(0.05
)

Basic and diluted shares outstanding and loss per share are equal for the three months ended March 31, 2015 and 2014 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,
 
2015
 
2014
Restricted stock, stock options and other equity awards
6.3

 
6.8