Stock Incentive Plans - Schedule of RSUs (Details) - RSUs	9 Months Ended
	Dec. 31, 2018 $ / shares shares
DXC Employee Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	3,985,616
Equity instruments other than options nonvested - granted (in shares) | shares	951,118
Equity instruments other than options nonvested - Issued due to Separation modification (in shares) | shares	649,649
Equity instruments other than options nonvested - settled (in shares) | shares	(2,163,890)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	(659,475)
Equity instruments other than options nonvested - ending balance (in shares) | shares	2,763,018
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 47.25
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	79.48
Weighted average fair value other than options - Issued due to Separation modification (in dollars per share) | $ / shares	51.95
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	33.22
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	60.70
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 67.24
DXC Director Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	66,386
Equity instruments other than options nonvested - granted (in shares) | shares	19,200
Equity instruments other than options nonvested - Issued due to Separation modification (in shares) | shares	10,488
Equity instruments other than options nonvested - settled (in shares) | shares	(20,324)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	0
Equity instruments other than options nonvested - ending balance (in shares) | shares	75,750
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 37.26
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	87.88
Weighted average fair value other than options - Issued due to Separation modification (in dollars per share) | $ / shares	37.69
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	51.59
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	0.00
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 46.31