CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income		$ (5,358)	$ 1,262	$ 1,782	[1]
Other comprehensive (loss) income, net of taxes:
Foreign currency translation adjustments, net of tax	[2]	(323)	(259)	197
Cash flow hedges adjustments, net of tax	[3]	(17)	(12)	(11)
Available-for-sale securities, net of tax	[4]	0	0	9
Pension and other post-retirement benefit plans, net of tax:
Prior service cost, net of tax	[5]	0	(21)	38
Amortization of transition obligation, net of tax	[6]	0	0	1
Amortization of prior service cost, net of tax	[7]	(8)	(13)	(14)
Pension and other post-retirement benefit plans, net of tax		(8)	(34)	25
Other comprehensive (loss) income, net of taxes		(348)	(305)	220
Comprehensive (loss) income		(5,706)	957	2,002
Less: comprehensive income attributable to non-controlling interest		22	2	31
Comprehensive (loss) income attributable to DXC common stockholders		$ (5,728)	$ 955	$ 1,971

[1] 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.

[2] ax (benefit) expense related to foreign currency translation adjustments was $(2), $(1), and $75 for the fiscal years ended March 31, 2020, March 31, 2019, March 31, 2018, respectively.

[3] Tax benefit related to cash flow hedge adjustments was $5, $3, and $3 for the fiscal years ended March 31, 2020, March 31, 2019, March 31, 2018, respectively.

[4] Tax expense related to available-for-sale securities was $0, $0, and $2 for the fiscal years ended March 31, 2020, March 31, 2019, March 31, 2018, respectively.

[5] Tax (benefit) expense related to prior service costs was $0, $(5), and $8 for the fiscal years ended March 31, 2020, March 31, 2019, March 31, 2018, respectively.

[6] There was no tax benefit related to transition obligation.

[7] Tax benefit related to amortization of prior service costs was $1, $2, and $4 for the fiscal years ended March 31, 2020, March 31, 2019, March 31, 2018, respectively.