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Earnings per common share
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Earnings per common share
Earnings per common share
The following table shows how the earnings (loss) per common share attributable to Unisys Corporation were computed for the three years ended December 31, 2016.
Year ended December 31,
 
2016

 
2015

 
2014

Basic earnings (loss) per common share computation
 
 
 
 
 
 
Net income (loss) attributable to Unisys Corporation common shareholders
 
$
(47.7
)
 
$
(109.9
)
 
$
44.0

Weighted average shares (thousands)
 
50,060

 
49,905

 
49,280

Basic earnings (loss) per common share
 
$
(0.95
)
 
$
(2.20
)
 
$
0.89

Diluted earnings (loss) per common share computation
 
 
 
 
 
 
Net income (loss) attributable to Unisys Corporation for diluted earnings per share
 
$
(47.7
)
 
$
(109.9
)
 
$
44.0

Weighted average shares (thousands)
 
50,060

 
49,905

 
49,280

Plus incremental shares from assumed conversions:
 
 
 
 
 
 
Employee stock plans
 
—

 
—

 
304

Adjusted weighted average shares
 
50,060

 
49,905

 
49,584

Diluted earnings (loss) per common share
 
$
(0.95
)
 
$
(2.20
)
 
$
0.89


In 2016, 2015 and 2014, the following weighted-average number of stock options and restricted stock units were antidilutive and therefore excluded from the computation of diluted earnings per common share (in thousands): 3,553; 2,915; and 1,929, respectively. In 2016, the following weighted-average number of common shares issuable upon conversion of the 5.50% Convertible Senior Notes due 2021 were antidilutive and therefore excluded from the computation of diluted earnings per share (in thousands): 17,230. In 2014, the following weighted-average mandatory convertible preferred stock was antidilutive and therefore excluded from the computation of diluted earnings per share (in thousands): 1,171.