Commitments and Contingencies - Contingencies (Details) administrator in Thousands, $ in Millions					1 Months Ended	12 Months Ended
	Oct. 02, 2017 USD ($)	Aug. 02, 2017 individual	Dec. 17, 2015 USD ($)	May 12, 2015 employee	Oct. 31, 2015 USD ($)	Apr. 01, 2016 employee	Apr. 03, 2015 administrator	Dec. 27, 2018 officer	Dec. 21, 2018 USD ($)	Oct. 05, 2018 plaintiff	Jan. 30, 2018	Feb. 02, 2017 joint_venture	May 12, 2016
Loss Contingencies [Line Items]
Number of partially-owned joint ventures involved in possible sanctions law violations | joint_venture												2
Strauch and Colby v. Computer Sciences Corporation
Loss Contingencies [Line Items]
Number of system administrators for class action, more than | administrator							4
Number of system administrators filed Consent to Join forms | administrator							1
Number of individuals involved in collective action | individual		700
Civil Complaint Against Eric Pulier
Loss Contingencies [Line Items]
Injunction filed, amount									$ 4.9
Forsyth v. HP Inc. and Hewlett Packard Enterprise
Loss Contingencies [Line Items]
Number of plaintiffs aligned with the company | plaintiff										7
City Of Warren Police and Fire Retirement System v. DXC Technology Company
Loss Contingencies [Line Items]
Number Of Officers Named In Case | officer								2
Settled litigation | Civil Complaint Against Eric Pulier
Loss Contingencies [Line Items]
Former employees under investigation | employee				2
Litigation settlement			$ 16.5
Former employees who pled guilty | employee						1
Loss contingency, legal fees percentage											80.00%		80.00%
Settled litigation | Kemper Corporate Services, Inc. v. Computer Sciences Corporation
Loss Contingencies [Line Items]
Amount awarded to other party	$ 84.2
Pending litigation | Kemper Corporate Services, Inc. v. Computer Sciences Corporation
Loss Contingencies [Line Items]
Loss contingency, damages sought					$ 100.0