CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 43	$ 47
Intangible assets, accumulated amortization	5,849	5,670
Property and equipment, accumulated depreciation	$ 4,166	$ 4,111
DXC stockholders’ equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	750,000,000	750,000,000
Common stock, issued (in shares)	210,584,214	218,058,482
Treasury shares (in shares)	4,507,506	3,333,592