Receivables - Narrative (Details) - Purchasers	3 Months Ended
Jun. 30, 2023 USD ($)
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Receivables facility, amount	$ 400,000,000
Drawn amount	380,000,000
Liability	20,000,000
Gain (loss) on sale of receivables	$ 0

Transfers of Financial Assets Accounted for as Sale, Securitization Facility, Liability

No definition available.

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Namespace Prefix:	dxc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Transfers of Financial Assets Accounted for as Sale, Securitization Facility

+ References

No definition available.

+ Details

Name:	dxc_TransfersofFinancialAssetsAccountedforasSaleSecuritizationFacility
Namespace Prefix:	dxc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Transfers of Financial Assets Accounted for as Sale, Securitization Facility, Drawn Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	dxc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects, by transferred financial asset type, the amount of sales proceeds in excess of or deficient from the sum of the carrying amounts of transferred financial assets plus transaction costs, including those transactions in which the seller/transferor has continuing involvement with the financial assets that have been transferred.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-3

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

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Balance Type:	na
Period Type:	duration

- Details

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