Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 29.8	$ 6.0	$ 13.0	$ 47.7
Other comprehensive income:
Foreign currency translation	(13.8)	(23.3)	(48.0)	(28.4)
Postretirement adjustments, net of tax of $4.2 and $3.1 in 2019 and $1.9 and $2.9 in 2018	50.4	39.9	118.9	78.9
Total other comprehensive income	36.6	16.6	70.9	50.5
Comprehensive income	66.4	22.6	83.9	98.2
Less comprehensive income attributable to noncontrolling interests	2.7	0.9	3.2	3.2
Comprehensive income attributable to Unisys Corporation	$ 63.7	$ 21.7	$ 80.7	$ 95.0