Summary of Significant Accounting Policies	6 Months Ended
Sep. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Business DXC Technology Company (“DXC” or the "Company") is the world's leading independent, end-to-end IT services company. DXC’s mission is to enable superior returns on its clients' technology investments through best-in-class vertical industry solutions, domain expertise, strategic partnerships with key technology leaders and global scale. The Company helps lead its clients through their digital transformations to meet new business demands and customer expectations in a market of escalating complexity, interconnectivity, mobility, and opportunity. DXC strives to be a trusted IT partner to its clients by addressing their requirements and providing next-generation IT services that include applications modernization, cloud infrastructure, cyber security, and big data solutions. Basis of Presentation The accompanying interim unaudited condensed consolidated financial statements (the "financial statements") include the accounts of DXC, its consolidated subsidiaries, and those business entities in which DXC maintains a controlling interest. Investments in business entities in which the Company does not have control, but has the ability to exercise significant influence over operating and financial policies, are accounted for by the equity method. Other investments are accounted for by the cost method. Non-controlling interests are presented as a separate component within equity in the condensed consolidated balance sheets. Net earnings attributable to the non-controlling interests are presented separately in the condensed consolidated statements of operations, and comprehensive income attributable to non-controlling interests are presented separately in the condensed consolidated statements of comprehensive income (loss). All intercompany transactions and balances have been eliminated. As previously disclosed, effective April 1, 2017, Computer Sciences Corporation ("CSC") completed its previously announced combination with the Enterprise Services business of Hewlett Packard Enterprise Company ("HPES"), which resulted in CSC becoming a wholly owned subsidiary of DXC (the "Merger"). See Note 3 - "Acquisitions" for further information. DXC common stock began regular-way trading under the symbol "DXC" on the New York Stock Exchange on April 3, 2017. Because CSC was deemed the accounting acquirer in this combination for accounting purposes under GAAP (defined below), CSC is considered DXC's predecessor and the historical financial statements of CSC prior to April 1, 2017, are reflected in this Quarterly Report on Form 10-Q as DXC's historical financial statements. Accordingly, the financial results of DXC as of and for any periods ending prior to April 1, 2017 do not include the financial results of HPES, and therefore, are not directly comparable. Additionally, "Prepaid expenses" and "other current assets" previously aggregated within "prepaid expenses and other current assets" have been separately disclosed, and prior year amounts have been reclassified to conform to the current year presentation. CSC used to report its results based on a fiscal year convention that comprises four thirteen-week quarters. However, effective April 1, 2017, DXC's fiscal year was modified to end on March 31 of each year with each quarter ending on the last calendar day. The financial statements of the Company have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission for quarterly reports and accounting principles generally accepted in the United States ("GAAP"). Certain disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules. These financial statements should therefore be read in conjunction with the audited consolidated financial statements and accompanying notes included in CSC's Annual Report on Form 10-K for the fiscal year ended March 31, 2017 ("fiscal 2017"), included in DXC's Annual Report on Form ARS for fiscal 2017. In the opinion of management, the accompanying financial statements of DXC contain all adjustments, including normal recurring adjustments, necessary to present fairly the Company's financial statements. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full fiscal year. In connection with the preparation of the Company’s condensed consolidated financial statements for the three months ended September 30, 2017, the Company identified a classification error in the June 30, 2017 condensed consolidated statement of operations, which resulted in an understatement of $126 million to selling, general and administrative expense and an overstatement of $126 million to cost of services for the three months ended June 30, 2017. The classification error was corrected during the three months ended September 30, 2017. The Company believes that this classification error is immaterial to the condensed consolidated statements of operations for the three months ended June 30, 2017 and September 30, 2017. This classification error had no impact on the condensed consolidated statement of operations for the six months ended September 30, 2017.

Basis of Presentation

The accompanying interim unaudited condensed consolidated financial statements (the "financial statements") include the accounts of DXC, its consolidated subsidiaries, and those business entities in which DXC maintains a controlling interest. Investments in business entities in which the Company does not have control, but has the ability to exercise significant influence over operating and financial policies, are accounted for by the equity method. Other investments are accounted for by the cost method. Non-controlling interests are presented as a separate component within equity in the condensed consolidated balance sheets. Net earnings attributable to the non-controlling interests are presented separately in the condensed consolidated statements of operations, and comprehensive income attributable to non-controlling interests are presented separately in the condensed consolidated statements of comprehensive income (loss). All intercompany transactions and balances have been eliminated.

As previously disclosed, effective April 1, 2017, Computer Sciences Corporation ("CSC") completed its previously announced combination with the Enterprise Services business of Hewlett Packard Enterprise Company ("HPES"), which resulted in CSC becoming a wholly owned subsidiary of DXC (the "Merger"). See Note 3 - "Acquisitions" for further information. DXC common stock began regular-way trading under the symbol "DXC" on the New York Stock Exchange on April 3, 2017. Because CSC was deemed the accounting acquirer in this combination for accounting purposes under GAAP (defined below), CSC is considered DXC's predecessor and the historical financial statements of CSC prior to April 1, 2017, are reflected in this Quarterly Report on Form 10-Q as DXC's historical financial statements. Accordingly, the financial results of DXC as of and for any periods ending prior to April 1, 2017 do not include the financial results of HPES, and therefore, are not directly comparable. Additionally, "Prepaid expenses" and "other current assets" previously aggregated within "prepaid expenses and other current assets" have been separately disclosed, and prior year amounts have been reclassified to conform to the current year presentation.

CSC used to report its results based on a fiscal year convention that comprises four thirteen-week quarters. However, effective April 1, 2017, DXC's fiscal year was modified to end on March 31 of each year with each quarter ending on the last calendar day.

The financial statements of the Company have been prepared in accordance with the rules and regulations of the U.S. Securities and Exchange Commission for quarterly reports and accounting principles generally accepted in the United States ("GAAP"). Certain disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules. These financial statements should therefore be read in conjunction with the audited consolidated financial statements and accompanying notes included in CSC's Annual Report on Form 10-K for the fiscal year ended March 31, 2017 ("fiscal 2017"), included in DXC's Annual Report on Form ARS for fiscal 2017. In the opinion of management, the accompanying financial statements of DXC contain all adjustments, including normal recurring adjustments, necessary to present fairly the Company's financial statements. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full fiscal year.

In connection with the preparation of the Company’s condensed consolidated financial statements for the three months ended September 30, 2017, the Company identified a classification error in the June 30, 2017 condensed consolidated statement of operations, which resulted in an understatement of $126 million to selling, general and administrative expense and an overstatement of $126 million to cost of services for the three months ended June 30, 2017. The classification error was corrected during the three months ended September 30, 2017. The Company believes that this classification error is immaterial to the condensed consolidated statements of operations for the three months ended June 30, 2017 and September 30, 2017. This classification error had no impact on the condensed consolidated statement of operations for the six months ended September 30, 2017.