Stock Incentive Plans - Schedule of RSUs (Details) - Restricted Stock Units	6 Months Ended
	Sep. 30, 2020 $ / shares shares
DXC Employee Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	4,174,476
Equity instruments other than options nonvested - granted (in shares) | shares	7,447,198
Equity instruments other than options nonvested - settled (in shares) | shares	(802,392)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	(755,601)
Equity instruments other than options nonvested - ending balance (in shares) | shares	10,063,681
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 55.45
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	17.05
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	57.46
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	36.90
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 27.55
DXC Director Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	114,615
Equity instruments other than options nonvested - granted (in shares) | shares	118,500
Equity instruments other than options nonvested - settled (in shares) | shares	(47,090)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	0
Equity instruments other than options nonvested - ending balance (in shares) | shares	186,025
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 37.69
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	18.82
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	27.28
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	$ 28.31