CONSOLIDATED COMBINED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net (loss) income	$ (676,000,000)	$ 72,000,000	$ 208,000,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	374,000,000	330,000,000	167,000,000
Impairment charges	796,000,000	0	0
Net periodic benefit cost	62,000,000	26,000,000	0
Share-based compensation	23,000,000	11,000,000	6,000,000
Deferred income taxes	(55,000,000)	8,000,000	(28,000,000)
Gain on sale or disposal of assets, net	(18,000,000)	(25,000,000)	0
Restructuring costs	17,000,000	10,000,000	14,000,000
Other non-cash charges, net	12,000,000	1,000,000	0
Changes in assets and liabilities, net of effects of acquisitions:
Receivables, net	97,000,000	102,000,000	49,000,000
Prepaid expenses and other current assets	63,000,000	(25,000,000)	20,000,000
Accounts payable, accrued expenses and other current liabilities	14,000,000	(18,000,000)	113,000,000
Deferred revenue and advanced contract payments	(35,000,000)	(11,000,000)	(11,000,000)
Income taxes payable and liability	(46,000,000)	(22,000,000)	0
Accrued restructuring	(1,000,000)	(4,000,000)	(8,000,000)
Other assets and liabilities, net	(1,000,000)	7,000,000	0
Net cash provided by operating activities	626,000,000	462,000,000	530,000,000
Cash flows from investing activities:
Payments for acquisitions, net of cash acquired	(265,000,000)	(312,000,000)	0
Extinguishment of Vencore debt and related costs	0	(994,000,000)	0
Proceeds from sale of assets	77,000,000	25,000,000	0
Purchases of property, equipment and software	(17,000,000)	(26,000,000)	(18,000,000)
Payments for outsourcing contract costs	(5,000,000)	(11,000,000)	(16,000,000)
Net cash used in investing activities	(210,000,000)	(1,318,000,000)	(34,000,000)
Cash flows from financing activities:
Principal payments on long-term debt	(93,000,000)	(170,000,000)	0
Proceeds from debt issuance	0	2,500,000,000	0
Payments of debt issuance costs	(4,000,000)	(46,000,000)	0
Proceeds from revolving credit facility	200,000,000	50,000,000	0
Payments on revolving credit facility	(150,000,000)	(50,000,000)	0
Payments on finance lease obligations	(141,000,000)	(172,000,000)	(157,000,000)
Repurchases of common stock	(66,000,000)	(59,000,000)	0
Repurchases of common stock to satisfy tax withholding obligations	(2,000,000)	(1,000,000)	0
Dividend to DXC	0	(984,000,000)	0
Dividends paid to Perspecta shareholders	(38,000,000)	(25,000,000)	0
Transfers to Parent, net	0	(88,000,000)	(339,000,000)
Net cash (used in) provided by financing activities	(294,000,000)	955,000,000	(496,000,000)
Net increase in cash and cash equivalents, including restricted	122,000,000	99,000,000	0
Cash and cash equivalents, including restricted, at beginning of year	99,000,000	0	0
Cash and cash equivalents, including restricted, at end of year	221,000,000	99,000,000	0
Less restricted cash and cash equivalents included in other current assets	74,000,000	11,000,000	0
Cash and cash equivalents at end of year	147,000,000	88,000,000	0
Supplemental cash flow disclosures:
Interest paid, net	127,000,000	115,000,000	11,000,000
Income taxes paid (refunded), net	32,000,000	61,000,000	19,000,000
Supplemental schedule of non-cash investing and financing activities:
Leased assets acquired through finance lease obligations	77,000,000	180,000,000	156,000,000
Leased assets acquired through operating lease obligations	100,000,000	0	0
Dividends declared but not yet paid	10,000,000	8,000,000	0
Stock issued for the acquisition of Vencore	$ 0	$ 578,000,000	$ 0