Stock Incentive Plans - Schedule of RSUs (Details) - Restricted Stock Units	3 Months Ended
	Jun. 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	7,135,966
Equity instruments other than options nonvested - settled (in shares) | shares	(713,578)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	(392,495)
Equity instruments other than options nonvested - ending balance (in shares) | shares	10,204,369
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	16.23
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	59.26
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	62.92
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 27.47
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	12,900
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	127,515
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	14.36
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	$ 35.33