Commitments and Contingencies - Contingencies (Details) administrator in Thousands, $ in Thousands				1 Months Ended								3 Months Ended	12 Months Ended
	Feb. 21, 2020 USD ($)	Aug. 06, 2019 USD ($)	May 12, 2015 employee	Dec. 31, 2019 USD ($) plaintiff	Oct. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) plaintiff	Mar. 31, 2019 lawsuit officer	Oct. 31, 2018 plaintiff	Oct. 31, 2017 USD ($)	Oct. 31, 2015 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2020 individual	Apr. 03, 2015 administrator	Dec. 27, 2018 officer	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
Number of system administrators filed Consent to Join forms | administrator														1
Number of individuals involved in collective action | individual													800
Damages awarded		$ 18,750
Damages sought						$ 14,100
Kemper Corporate Services, Inc. v. Computer Sciences Corporation
Loss Contingencies [Line Items]
Payments for litigation settlement	$ 60,000
In re DXC Technology Company Securities Litigation
Loss Contingencies [Line Items]
Number of officers named in case | officer															2
Number of lawsuits filed | lawsuit								3
Perspecta-related Disputes, Separation and Distribution Agreement
Loss Contingencies [Line Items]
Damages sought				$ 500,000	$ 120,000							$ 800,000
Perspecta-related Disputes, IT Services Agreement
Loss Contingencies [Line Items]
Damages sought							$ 39,000
Officer | In re DXC Technology Company Securities Litigation
Loss Contingencies [Line Items]
Number of defendants | officer								1
Pending Litigation | Kemper Corporate Services, Inc. v. Computer Sciences Corporation
Loss Contingencies [Line Items]
Damages sought											$ 100,000
Pending Litigation | Forsyth et al. v. HP Inc. and Hewlett Packard Enterprise
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff							145		16
Settled Litigation | Computer Sciences Corporation v. Eric Pulier et al
Loss Contingencies [Line Items]
Former employees under investigation | employee			2
Loss contingency, legal fees percentage																	80.00%
Settled Litigation | Kemper Corporate Services, Inc. v. Computer Sciences Corporation
Loss Contingencies [Line Items]
Litigation settlement to other party										$ 84,200
Settled Litigation | Forsyth et al. v. HP Inc. and Hewlett Packard Enterprise
Loss Contingencies [Line Items]
Number of plaintiffs | plaintiff				142
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