CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenues	$ 5,178	$ 5,460	$ 15,473	$ 16,149
Costs of services (excludes depreciation and amortization and restructuring costs)	3,725	4,051	11,110	12,230
Selling, general, and administrative (excludes depreciation and amortization and restructuring costs)	491	447	1,500	1,484
Depreciation and amortization	508	440	1,463	1,264
Restructuring costs	76	210	418	585
Interest expense	81	73	249	220
Interest income	(27)	(27)	(92)	(59)
Other income, net	(145)	(75)	(336)	(291)
Total costs and expenses	4,709	5,119	14,312	15,433
Income from continuing operations before income taxes	469	341	1,161	716
Income tax expense (benefit)	3	(365)	205	(303)
Income from continuing operations	466	706	956	1,019
Income from discontinued operations, net of taxes	0	73	35	198
Net income	466	779	991	1,217
Less: net income attributable to non-controlling interest, net of tax	4	3	8	26
Net income attributable to DXC common stockholders	$ 462	$ 776	$ 983	$ 1,191
Basic:
Continuing operations (in dollars per share)	$ 1.68	$ 2.46	$ 3.38	$ 3.48
Discontinued operations (in dollars per share)	0.00	0.26	0.12	0.70
Basic (in dollars per share)	1.68	2.72	3.50	4.18
Diluted:
Continuing operations (in dollars per share)	1.66	2.43	3.33	3.43
Discontinued operations (in dollars per share)	0.00	0.25	0.12	0.68
Diluted (in dollars per share)	$ 1.66	$ 2.68	$ 3.45	$ 4.11