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Document and Entity Information	Nov. 11, 2019
Document And Entity Information [Line Items]
Entity Registrant Name	DXC Technology Co
Amendment Flag	false
Entity Central Index Key	0001688568
Document Type	8-K
Document Period End Date	Nov. 11, 2019
Entity Incorporation State Country Code	NV
Entity File Number	001-38033
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
Written Communications	false
Soliciting Material	false
Pre Commencement Tender Offer	false
Pre Commencement Issuer Tender Offer	false
Entity Emerging Growth Company	false
Common Stock [Member]
Document And Entity Information [Line Items]
Security 12b Title	Common Stock, $0.01 par value per share
Trading Symbol	DXC
Security Exchange Name	NYSE
M 2.750 Senior Notes Due 20252 [Member]
Document And Entity Information [Line Items]
Security 12b Title	2.750% Senior Notes Due 2025
Trading Symbol	DXC 25
Security Exchange Name	NYSE
M 1.750 Senior Notes Due 20261 [Member]
Document And Entity Information [Line Items]
Security 12b Title	1.750% Senior Notes Due 2026
Trading Symbol	DXC 26
Security Exchange Name	NYSE

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