Stock Incentive Plans - Schedule of RSUs (Details) - RSUs	3 Months Ended
	Jun. 30, 2019 $ / shares shares
DXC Employee Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	2,809,775
Equity instruments other than options nonvested - granted (in shares) | shares	2,103,678
Equity instruments other than options nonvested - settled (in shares) | shares	(644,601)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	(114,098)
Equity instruments other than options nonvested - ending balance (in shares) | shares	4,154,754
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 67.27
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	50.35
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	48.92
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	65.14
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 61.61
DXC Director Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	75,750
Equity instruments other than options nonvested - granted (in shares) | shares	3,200
Equity instruments other than options nonvested - settled (in shares) | shares	0
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	0
Equity instruments other than options nonvested - ending balance (in shares) | shares	78,950
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 46.31
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	77.62
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	0
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	0
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 47.58