Stock Incentive Plans - Schedule of RSUs (Details) - Restricted Stock Units	9 Months Ended
	Dec. 31, 2021 $ / shares shares
DXC Employee Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	8,326,220
Equity instruments other than options nonvested - granted (in shares) | shares	2,922,936
Equity instruments other than options nonvested - settled (in shares) | shares	(1,848,242)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	(1,366,605)
Equity instruments other than options nonvested - ending balance (in shares) | shares	8,034,309
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 28.98
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	51.19
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	33.47
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	36.32
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 35.83
DXC Director Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	184,660
Equity instruments other than options nonvested - granted (in shares) | shares	74,300
Equity instruments other than options nonvested - settled (in shares) | shares	(102,238)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	0
Equity instruments other than options nonvested - ending balance (in shares) | shares	156,722
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 28.42
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	35.18
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	21.43
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	$ 36.18