CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) (Unaudited) - USD ($) $ in Millions	Total	Total Unisys Corporation	Common Stock Par Value	Accumu-lated Deficit	Treasury Stock At Cost	Paid-in Capital	Accumu-lated Other Compre-hensive Loss	Non-controlling Interests
Beginning balance at Dec. 31, 2021	$ (64.4)	$ (113.7)	$ 0.7	$ (1,409.0)	$ (152.2)	$ 4,710.9	$ (3,264.1)	$ 49.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(57.0)	(57.3)		(57.3)				0.3
Stock-based activity	2.2	2.2			(3.5)	5.7
Translation adjustments	(17.7)	(14.9)					(14.9)	(2.8)
Postretirement plans	57.3	55.7					55.7	1.6
Ending balance at Mar. 31, 2022	(79.6)	(128.0)	0.7	(1,466.3)	(155.7)	4,716.6	(3,223.3)	48.4
Beginning balance at Dec. 31, 2021	(64.4)	(113.7)	0.7	(1,409.0)	(152.2)	4,710.9	(3,264.1)	49.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(73.8)
Translation adjustments	(113.3)
Postretirement plans	145.7
Ending balance at Jun. 30, 2022	(98.5)	(147.2)	0.7	(1,483.4)	(155.9)	4,721.9	(3,230.5)	48.7
Beginning balance at Mar. 31, 2022	(79.6)	(128.0)	0.7	(1,466.3)	(155.7)	4,716.6	(3,223.3)	48.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(16.8)	(17.1)		(17.1)				0.3
Stock-based activity	5.1	5.1			(0.2)	5.3
Translation adjustments	(95.6)	(92.3)					(92.3)	(3.3)
Postretirement plans	88.4	85.1					85.1	3.3
Ending balance at Jun. 30, 2022	(98.5)	(147.2)	0.7	(1,483.4)	(155.9)	4,721.9	(3,230.5)	48.7
Beginning balance at Dec. 31, 2022	21.8	(14.7)	0.7	(1,515.0)	(156.0)	4,731.6	(3,076.0)	36.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(174.5)	(175.4)		(175.4)				0.9
Stock-based activity	4.0	4.0			(0.3)	4.3
Translation adjustments	24.4	23.3					23.3	1.1
Postretirement plans	178.3	179.5					179.5	(1.2)
Ending balance at Mar. 31, 2023	54.0	16.7	0.7	(1,690.4)	(156.3)	4,735.9	(2,873.2)	37.3
Beginning balance at Dec. 31, 2022	21.8	(14.7)	0.7	(1,515.0)	(156.0)	4,731.6	(3,076.0)	36.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(214.0)
Translation adjustments	56.9
Postretirement plans	176.5
Ending balance at Jun. 30, 2023	49.3	11.4	0.7	(1,730.4)	(156.4)	4,740.1	(2,842.6)	37.9
Beginning balance at Mar. 31, 2023	54.0	16.7	0.7	(1,690.4)	(156.3)	4,735.9	(2,873.2)	37.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(39.5)	(40.0)		(40.0)				0.5
Stock-based activity	4.1	4.1			(0.1)	4.2
Translation adjustments	32.5	30.8					30.8	1.7
Postretirement plans	(1.8)	(0.2)					(0.2)	(1.6)
Ending balance at Jun. 30, 2023	$ 49.3	$ 11.4	$ 0.7	$ (1,730.4)	$ (156.4)	$ 4,740.1	$ (2,842.6)	$ 37.9