CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions		Total		Common Stock	Additional Paid-In Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock		Total DXC Equity	Non-Controlling Interest	As Previously Reported	As Previously Reported Common Stock	As Previously Reported Additional Paid-In Capital	As Previously Reported (Accumulated Deficit) Retained Earnings	As Previously Reported Accumulated Other Comprehensive Income (Loss)	As Previously Reported Treasury Stock	As Previously Reported Total DXC Equity	As Previously Reported Non-Controlling Interest	Restatement Adjustment	[1]	Restatement Adjustment Common Stock		Restatement Adjustment Additional Paid-In Capital		Restatement Adjustment Treasury Stock
Balance (in shares) at Apr. 01, 2016				148,747,000									148,747,000
Balance at Apr. 01, 2016		$ 2,032		$ 1	$ 2,587	$ 33	$ (111)	$ (485)		$ 2,025	$ 7	$ 2,032	$ 149	$ 2,439	$ 33	$ (111)	$ (485)	$ 2,025	$ 7	$ 0		$ (148)	[1]	$ 148	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income		(100)	[2]			(123)				(123)	23
Other comprehensive Income (loss)		(67)					(51)			(51)	(16)
Share-based compensation expense		73			73					73
Acquisition of treasury stock		(12)						(12)		(12)
Stock option exercises and other common stock transactions (in shares)	[1]			3,185,000
Stock option exercises and other common stock transactions	[1]	56			56					56
Dividends declared		(80)				(80)				(80)
Noncontrolling interest distributions and other		(17)									(17)
Noncontrolling interest from acquisition	[3]	281									281
Balance (in shares) at Mar. 31, 2017				141,299,000									151,932,000									(10,633,000)	[1],[4]
Balance at Mar. 31, 2017		2,166		$ 1	2,219	(170)	(162)	0		1,888	278	2,166	$ 152	2,565	(170)	(162)	(497)	1,888	278			$ (151)	[4]	(346)	[4]	$ 497	[4]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance												$ 2,166	$ 1	$ 2,716	$ (170)	$ (162)	$ (497)	$ 1,888	$ 278	$ 0		$ 0	[1]	$ (497)	[1]	$ 497	[1]
Business acquired in purchase, net of issuance costs (in shares)	[5]			141,741,000
Business acquired in purchase, net of issuance costs	[5]	9,900		$ 2	9,848					9,850	50
Net (loss) income		1,782	[2],[6]			1,751				1,751	31
Other comprehensive Income (loss)		220					220			220
Share-based compensation expense		92			92					92
Acquisition of treasury stock		(85)						(85)		(85)
Share repurchase program (in shares)				(1,538,000)
Share repurchase program		(137)			(66)	(71)				(137)
Stock option exercises and other common stock transactions (in shares)				4,891,000
Stock option exercises and other common stock transactions		117			117					117
Dividends declared		(209)				(209)				(209)
Noncontrolling interest distributions and other		(9)									(9)
Balance (in shares) at Mar. 31, 2018				286,393,000
Balance at Mar. 31, 2018		$ 13,837		$ 3	12,210	1,301	58	(85)	[7]	13,487	350
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares		1,016,947
Net (loss) income		$ 1,262				1,257				1,257	5
Other comprehensive Income (loss)		(305)					(302)			(302)	(3)
Share-based compensation expense		74			74					74
Acquisition of treasury stock		(51)						(51)	[7]	(51)
Share repurchase program (in shares)				(19,343,000)
Share repurchase program		(1,339)			(845)	(494)				(1,339)
Stock option exercises and other common stock transactions (in shares)				3,164,000
Stock option exercises and other common stock transactions		37			37					37
Dividends declared		(209)				(209)				(209)
Noncontrolling interest distributions and other		(29)									(29)
Divestiture of USPS		(1,666)			(175)	(1,491)				(1,666)
Balance (in shares) at Mar. 31, 2019				270,214,000
Balance at Mar. 31, 2019		$ 11,725		$ 3	$ 11,301	$ 478	$ (244)	$ (136)	[7]	$ 11,402	$ 323
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares		1,788,658

[1] Certain prior year amounts were adjusted to retroactively reflect the legal capital of DXC.

[2] Fiscal 2018 and fiscal 2017 have been adjusted to give effect to the retrospective adoption of ASU 2016-15. See Note 22 - "Reconciliation of Previously Reported Amounts to Recast Financial Statements."

[3] See Note 2 - "Acquisitions"

[4] Certain prior year amounts were adjusted to retroactively reflect the legal capital of DXC.

[5] See Note 2 - "Acquisitions"

[6] As a result of the USPS Separation, the Consolidated Statements of Operations, Consolidated Balance Sheets, and related financial information reflect USPS's operations and assets and liabilities as discontinued operations for all periods presented. The cash flows of USPS have not been segregated and are included in the Consolidated Statement of Cash flows for the fiscal year ended March 31, 2018 and through the separation date of May 31, 2018 in the Consolidated Statement of Cash Flows for the fiscal year ended March 31, 2019.

[7] 1,788,658 treasury shares as of March 31, 2019