CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (unaudited) - USD ($) $ in Millions		Total		Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive (Loss) Income	Treasury Stock		Total DXC Equity	Non-Controlling Interest
Balance (in shares) (As Previously Reported) at Apr. 01, 2016				148,747,000
Balance (in shares) at Apr. 01, 2016				148,747,000
Balance (As Previously Reported) at Apr. 01, 2016		$ 2,032		$ 149	$ 2,439	$ 33	$ (111)	$ (485)		$ 2,025	$ 7
Balance (Adjustment) at Apr. 01, 2016	[1]	0		(147)	147
Balance at Apr. 01, 2016		2,032		$ 2	2,586	33	(111)	(485)		2,025	7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1				(6)				(6)	7
Other comprehensive income		(4)					(4)			(4)
Share-based compensation expense		35			35					35
Acquisition of treasury stock		(11)						(11)		(11)
Stock option exercises and other common stock transactions (in shares)				2,627,000
Stock option exercises and other common stock transactions		43			43					43
Dividends declared		(39)				(39)				(39)
Non-controlling interest distributions and other		(11)									(11)
Non-controlling interest from acquisition		281									281
Divestiture of NPS		(2)				(2)				(2)
Balance (in shares) at Sep. 30, 2016				151,374,000
Balance at Sep. 30, 2016		$ 2,325		$ 2	2,664	(14)	(115)	(496)		2,041	284
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares	[2]	0
Balance (in shares) (As Previously Reported) at Mar. 31, 2017				151,932,000
Balance (in shares) (Adjustment) at Mar. 31, 2017	[1]			(10,633,000)
Balance (in shares) at Mar. 31, 2017				141,299,000
Balance (As Previously Reported) at Mar. 31, 2017		$ 2,166		$ 152	2,565	(170)	(162)	(497)	[3]	1,888	278
Balance (Adjustment) at Mar. 31, 2017	[1]	0		(151)	(346)			497	[3]
Balance at Mar. 31, 2017		2,166	[2]	$ 1	2,219	(170)	(162)	0	[3]	1,888	278
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Business acquired in purchase, net of issuance costs (in shares)	[4]			141,741,000
Business acquired in purchase, net of issuance costs	[4]	9,911		$ 2	9,848					9,850	61
Net income		438				415				415	23
Other comprehensive income		97					92			92	5
Share-based compensation expense		57			57					57
Acquisition of treasury stock		(61)						(61)	[3]	(61)
Share repurchase program (in shares)				(842,000)
Share repurchase program		(66)			(36)	(30)				(66)
Stock option exercises and other common stock transactions (in shares)				3,745,000
Stock option exercises and other common stock transactions		70			70					70
Dividends declared		(105)				(105)				(105)
Balance (in shares) at Sep. 30, 2017				285,943,000
Balance at Sep. 30, 2017		$ 12,507		$ 3	$ 12,158	$ 110	$ (70)	$ (61)	[3]	$ 12,140	$ 367
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares		762,677

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

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

[3] 762,677 treasury shares as of September 30, 2017

[4] See Note 3 - "Acquisitions"