CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Cumulative effect of adopting ASU 2016-13	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Retained Earnings (Accumulated Deficit) Cumulative effect of adopting ASU 2016-13	Accumulated Other Comprehensive Loss	Treasury Stock		Total DXC Equity	Total DXC Equity Cumulative effect of adopting ASU 2016-13	Non-Controlling Interest
Beginning balance (in shares) at Mar. 31, 2019			270,214
Beginning balance at Mar. 31, 2019	$ 11,725		$ 3	$ 11,301	$ 478		$ (244)	$ (136)	[1]	$ 11,402		$ 323
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adopting ASU 2016-13	Accounting Standards Update 2016-13 [Member]
Net income (loss)	$ (5,358)				(5,369)					(5,369)		11
Other comprehensive income (loss)	(348)						(359)			(359)		11
Share-based compensation expense	70			70						70
Acquisition of treasury stock	(16)							(16)	[1]	(16)
Share repurchase program (in shares)			(15,934)
Share repurchase program	(736)			(669)	(67)					(736)
Stock option exercises and other common stock transactions (in shares)			1,394
Stock option exercises and other common stock transactions	12			12						12
Dividends declared	(219)				(219)					(219)
Non-controlling interest distributions and other	(1)									0		(1)
Ending balance (in shares) at Mar. 31, 2020			255,674
Ending balance at Mar. 31, 2020	5,129	$ (4)	$ 3	10,714	(5,177)	$ (4)	(603)	(152)	[1],[2]	4,785	$ (4)	344
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(146)				(149)					(149)		3
Other comprehensive income (loss)	304						301			301		3
Share-based compensation expense	46			46						46
Acquisition of treasury stock	(6)							(6)	[2]	(6)
Stock option exercises and other common stock transactions (in shares)			1,379
Stock option exercises and other common stock transactions	1			1						1
Non-controlling interest distributions and other	(16)				(1)					(1)		(15)
Ending balance (in shares) at Mar. 31, 2021			257,053
Ending balance at Mar. 31, 2021	5,308		$ 3	10,761	(5,331)		(302)	(158)	[2],[3]	4,973		335
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	736				718					718		18
Other comprehensive income (loss)	(72)						(83)			(83)		11
Share-based compensation expense	80			80						80
Acquisition of treasury stock	(15)							(15)	[3]	(15)
Share repurchase program (in shares)			(18,819)
Share repurchase program	(634)			(796)	162					(634)
Stock option exercises and other common stock transactions (in shares)			2,274
Stock option exercises and other common stock transactions	12			12						12
Non-controlling interest distributions and other	(40)				1					1		(41)
Ending balance (in shares) at Mar. 31, 2022			240,508
Ending balance at Mar. 31, 2022	$ 5,375		$ 3	$ 10,057	$ (4,450)		$ (385)	$ (173)	[3]	$ 5,052		$ 323

[1] 2,148,708 treasury shares as of March 31, 2020

[2] 2,458,027 treasury shares as of March 31, 2021

[3] 2,878,079 treasury shares as of March 31, 2022