Commitments and Contingencies - Contingencies (Details) $ in Thousands		1 Months Ended								3 Months Ended	6 Months Ended
	Aug. 06, 2019 USD ($)	Aug. 31, 2020 USD ($)	Jul. 31, 2020 USD ($)	Dec. 31, 2019 plaintiff	Oct. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) plaintiff	Mar. 31, 2019 lawsuit officer	Oct. 31, 2018 plaintiff	Jul. 03, 2015 administrator	Sep. 30, 2020 USD ($) individual	Feb. 02, 2017 joint_venture	Feb. 29, 2016
Loss Contingencies [Line Items]
Number of partially-owned joint ventures involved in possible sanctions law violations | joint_venture												2
Strauch Fair Labor Standards Act Collective Action
Loss Contingencies [Line Items]
Number of plaintiffs | administrator										4,000
Number of system administrators filed consents with ourt to participate in FLSA collective | administrator										1,000
Number of individuals involved in collective action | individual											800
Amount awarded to plaintiffs	$ 18,750		$ 8,100
Loss contingency, damages sought						$ 14,100
In re DXC Technology Company Securities Litigation
Loss Contingencies [Line Items]
Lawsuits filed | lawsuit								3
Perspecta-related Disputes, Separation and Distribution Agreement
Loss Contingencies [Line Items]
Loss contingency, damages sought					$ 120,000
Perspecta-related Disputes, Separation and Distribution Agreement, Increase One
Loss Contingencies [Line Items]
Loss contingency, damages sought											$ 500,000
Perspecta-related Disputes, Separation and Distribution Agreement, Increase Two
Loss Contingencies [Line Items]
Loss contingency, damages sought											800,000
Perspecta-related Disputes, Separation and Distribution Agreement, Increase Three
Loss Contingencies [Line Items]
Loss contingency, damages sought											$ 990,000
Perspecta-related Disputes, IT Services Agreement
Loss Contingencies [Line Items]
Loss contingency, damages sought		$ 31,000					$ 39,000
Settled litigation | Computer Sciences Corporation v. Eric Pulier et al.
Loss Contingencies [Line Items]
Loss contingency, legal fees percentage													80.00%
Settled litigation | Forsyth et al. v. HP Inc. and Hewlett Packard Enterprise
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff				142
Pending litigation | Forsyth et al. v. HP Inc. and Hewlett Packard Enterprise
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff							145		16
Officer | In re DXC Technology Company Securities Litigation
Loss Contingencies [Line Items]
Number of defendants | officer								1
Employees of Former Business Units of HPE | Settled litigation | Forsyth et al. v. HP Inc. and Hewlett Packard Enterprise
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff				35					7