Stock Incentive Plans - Schedule of RSUs (Details) - Restricted Stock Units	9 Months Ended
	Dec. 31, 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	7,576,602
Equity instruments other than options nonvested - settled (in shares) | shares	(1,045,190)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	(2,042,804)
Equity instruments other than options nonvested - ending balance (in shares) | shares	8,663,084
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	18.67
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	50.65
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	36.14
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 28.43
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	(48,455)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	0
Equity instruments other than options nonvested - ending balance (in shares) | shares	184,660
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	26.90
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	$ 28.42