Stock Incentive Plans - Schedule of Share Based Compensation Shares Authorized (Details)	Mar. 31, 2024 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for issuance (in shares)	51,945,000
Available for future grant (in shares)	24,379,449
DXC Employee Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for issuance (in shares)	51,200,000
Available for future grant (in shares)	24,212,597
DXC Director Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for issuance (in shares)	745,000
Available for future grant (in shares)	166,852