Goodwill and Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 29, 2021	Jan. 31, 2020	Feb. 01, 2019	Mar. 13, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 2,787,000,000	$ 2,139,000,000
Impairment of goodwill	0	0
Amortization expense related to intangible assets	147,000,000	95,000,000	$ 24,000,000
Impairment of Intangible Assets, Finite-lived	0	$ 0
Goodwill, Period (Increase) Decrease	(648,000,000)
Unisys Federal
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 654,000,000
Amortization expense related to intangible assets	15,000,000
Goodwill, Period (Increase) Decrease	(654,000,000)
Non-Strategic International Operations
Finite-Lived Intangible Assets [Line Items]
Goodwill, Period (Increase) Decrease	$ 6,000,000