CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenues	$ 5,021,000,000	$ 5,178,000,000	$ 14,762,000,000	$ 15,473,000,000
Costs of services (excludes depreciation and amortization and restructuring costs)	3,827,000,000	3,725,000,000	11,128,000,000	11,110,000,000
Selling, general, and administrative (excludes depreciation and amortization and restructuring costs)	518,000,000	491,000,000	1,514,000,000	1,500,000,000
Depreciation and amortization	479,000,000	508,000,000	1,416,000,000	1,463,000,000
Goodwill impairment losses	53,000,000	0	2,940,000,000	0
Restructuring costs	74,000,000	76,000,000	248,000,000	418,000,000
Interest expense	93,000,000	81,000,000	288,000,000	249,000,000
Interest income	(33,000,000)	(27,000,000)	(130,000,000)	(92,000,000)
Gain on arbitration award	0	0	(632,000,000)	0
Other income, net	(117,000,000)	(145,000,000)	(344,000,000)	(336,000,000)
Total costs and expenses	4,894,000,000	4,709,000,000	16,428,000,000	14,312,000,000
Income (loss) from continuing operations before income taxes	127,000,000	469,000,000	(1,666,000,000)	1,161,000,000
Income tax expense	37,000,000	3,000,000	191,000,000	205,000,000
Income (loss) from continuing operations	90,000,000	466,000,000	(1,857,000,000)	956,000,000
Income from discontinued operations, net of taxes	0	0	0	35,000,000
Net income (loss)	90,000,000	466,000,000	(1,857,000,000)	991,000,000
Less: net income attributable to non-controlling interest, net of tax	8,000,000	4,000,000	17,000,000	8,000,000
Net income (loss) attributable to DXC common stockholders	$ 82,000,000	$ 462,000,000	$ (1,874,000,000)	$ 983,000,000
Basic:
Continuing operations (in dollars per share)	$ 0.32	$ 1.68	$ (7.20)	$ 3.38
Discontinued operations (in dollars per share)	0	0	0	0.12
Basic (in dollars per share)	0.32	1.68	(7.20)	3.50
Diluted:
Continuing operations (in dollars per share)	0.32	1.66	(7.20)	3.33
Discontinued operations (in dollars per share)	0	0	0	0.12
Diluted (in dollars per share)	$ 0.32	$ 1.66	$ (7.20)	$ 3.45