Cover Page - shares	3 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Registrant Name	DXC Technology Co
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	61-1800317
Entity Address, Address Line One	1775 Tysons Boulevard
Entity Address, City or Town	Tysons
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	22102
City Area Code	703
Local Phone Number	245-9675
Entity Central Index Key	0001688568
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Document Period End Date	Jun. 30, 2019
Entity File Number	001-38033
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		261,962,477
Entity Small Business	false
Entity Emerging Growth Company	false
Common Stock
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value per share
Trading Symbol	DXC
Security Exchange Name	NYSE
Senior notes due 2025
Entity Information [Line Items]
Title of 12(b) Security	2.750% Senior Notes Due 2025
Trading Symbol	DXC 25
Security Exchange Name	NYSE
Senior notes due 2026
Entity Information [Line Items]
Title of 12(b) Security	1.750% Senior Notes Due 2026
Trading Symbol	DXC 26
Security Exchange Name	NYSE