CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues	$ 19,577,000,000	$ 20,753,000,000	$ 21,733,000,000
Costs of services (excludes depreciation and amortization and restructuring costs)	14,901,000,000	14,946,000,000	16,317,000,000
Selling, general and administrative (excludes depreciation and amortization and restructuring costs)	2,050,000,000	1,959,000,000	1,890,000,000
Depreciation and amortization	1,942,000,000	1,968,000,000	1,795,000,000
Goodwill impairment losses	6,794,000,000	0	0	[1]
Restructuring costs	252,000,000	465,000,000	789,000,000
Interest expense	383,000,000	334,000,000	320,000,000
Interest income	(165,000,000)	(128,000,000)	(89,000,000)
Gain on arbitration award	(632,000,000)	0	0
Other income, net	(720,000,000)	(306,000,000)	(593,000,000)
Total costs and expenses	24,805,000,000	19,238,000,000	20,429,000,000
(Loss) income from continuing operations, before taxes	(5,228,000,000)	1,515,000,000	1,304,000,000
Income tax expense (benefit)	130,000,000	288,000,000	(242,000,000)
(Loss) income from continuing operations	(5,358,000,000)	1,227,000,000	1,546,000,000
Income from discontinued operations, net of taxes	0	35,000,000	236,000,000
Net (loss) income	(5,358,000,000)	1,262,000,000	1,782,000,000	[1]
Less: net income attributable to non-controlling interest, net of tax	11,000,000	5,000,000	31,000,000
Net (loss) income attributable to DXC common stockholders	$ (5,369,000,000)	$ 1,257,000,000	$ 1,751,000,000
Income (loss) per common share - Basic:
Continuing operations (in dollars per share)	$ (20.76)	$ 4.40	$ 5.32
Discontinued operations (in dollars per share)	0	0.13	0.83
Basic EPS (in dollars per share)	(20.76)	4.53	6.15
Income (loss) per common share - Diluted:
Continuing operations (in dollars per share)	(20.76)	4.35	5.23
Discontinued operations (in dollars per share)	0	0.12	0.81
Diluted EPS (in dollars per share)	$ (20.76)	$ 4.47	$ 6.04

[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.