| Document and Entity Information | Mar. 19, 2024 |
| 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 | Mar. 19, 2024 |
| Entity Incorporation State Country Code | NV |
| Entity File Number | 001-38033 |
| Entity Tax Identification Number | 61-1800317 |
| Entity Address, Address Line One | 20408 Bashan Drive |
| Entity Address, Address Line Two | Suite 231 |
| Entity Address, City or Town | Ashburn |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 20147 |
| City Area Code | (703) |
| Local Phone Number | 972-7000 |
| 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 |
| Senior Notes [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 1.750% Senior Notes Due 2026 |
| Trading Symbol | DXC 26 |
| Security Exchange Name | NYSE |
