CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Consolidated net loss	$ (39.5)	$ (16.8)	$ (214.0)	$ (73.8)
Other comprehensive income (loss)
Foreign currency translation	32.5	(95.6)	56.9	(113.3)
Postretirement adjustments, net of tax of $(4.4) and $(7.4) in 2023 and $14.1 and $20.8 in 2022	(1.8)	88.4	176.5	145.7
Total other comprehensive income (loss)	30.7	(7.2)	233.4	32.4
Comprehensive (loss) income	(8.8)	(24.0)	19.4	(41.4)
Less comprehensive income (loss) attributable to noncontrolling interests	0.6	0.3	1.4	(0.6)
Comprehensive (loss) income attributable to Unisys Corporation	$ (9.4)	$ (24.3)	$ 18.0	$ (40.8)