Earnings per common share (Tables)

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Computation of Earnings (Loss) Per Common Share Attributable to Unisys Corporation

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