Subsequent Events	12 Months Ended
Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Merger with HPES As previously disclosed, effective April 1, 2017, CSC became a wholly owned subsidiary of DXC, an independent public company formed in connection with the spin-off of HPES. DXC common stock began regular-way trading under the symbol “DXC” on the New York Stock Exchange on April 3, 2017. CSC completed its combination with HPES for purchase consideration of approximately $10 billion. CSC stockholders received one share of DXC common stock for every one share of CSC common stock held immediately prior to the Merger. DXC issued a total of 141,298,797 shares of DXC common stock to CSC stockholders, representing approximately 49.9% of the outstanding shares of DXC common stock immediately following the Merger. As a result of the Merger, the borrowing capacity under the revolving credit facility increased $740 million to a total borrowing capacity of $3.7 billion. As a result of the Merger, each outstanding Company stock option, stock appreciation right, RSU (including dividend equivalents) and PSU held by the Company’s employees and non-employee directors were converted into an equivalent award of DXC. Beginning with DXC's Quarterly Report on Form 10-Q for the quarter ending June 30, 2017, DXC will report on a consolidated basis representing the combined operations of CSC and HPES and their respective subsidiaries. Because CSC was deemed the accounting acquirer in this combination under U.S. GAAP, the historical financial statements of CSC will be reflected in DXC's future quarterly and annual reports. Due to the close proximity in timing of the Merger and CSC's filing of this Annual Report on Form 10-K for the fiscal year ended March 31, 2017, the valuation report is not yet available, and the initial accounting for the business combination is incomplete; therefore, the Company is unable to disclose certain information required by ASC 805 "Business Combinations." The Company plans to provide preliminary purchase price allocation information in DXC's Quarterly Report on Form 10-Q for the quarter ending June 30, 2017.

Subsequent Events

Merger with HPES

As previously disclosed, effective April 1, 2017, CSC became a wholly owned subsidiary of DXC, an independent public company formed in connection with the spin-off of HPES. DXC common stock began regular-way trading under the symbol “DXC” on the New York Stock Exchange on April 3, 2017.

CSC completed its combination with HPES for purchase consideration of approximately $10 billion. CSC stockholders received one share of DXC common stock for every one share of CSC common stock held immediately prior to the Merger. DXC issued a total of 141,298,797 shares of DXC common stock to CSC stockholders, representing approximately 49.9% of the outstanding shares of DXC common stock immediately following the Merger. As a result of the Merger, the borrowing capacity under the revolving credit facility increased $740 million to a total borrowing capacity of $3.7 billion.

As a result of the Merger, each outstanding Company stock option, stock appreciation right, RSU (including dividend equivalents) and PSU held by the Company’s employees and non-employee directors were converted into an equivalent award of DXC.

Beginning with DXC's Quarterly Report on Form 10-Q for the quarter ending June 30, 2017, DXC will report on a consolidated basis representing the combined operations of CSC and HPES and their respective subsidiaries. Because CSC was deemed the accounting acquirer in this combination under U.S. GAAP, the historical financial statements of CSC will be reflected in DXC's future quarterly and annual reports. Due to the close proximity in timing of the Merger and CSC's filing of this Annual Report on Form 10-K for the fiscal year ended March 31, 2017, the valuation report is not yet available, and the initial accounting for the business combination is incomplete; therefore, the Company is unable to disclose certain information required by ASC 805 "Business Combinations." The Company plans to provide preliminary purchase price allocation information in DXC's Quarterly Report on Form 10-Q for the quarter ending June 30, 2017.