Stock Incentive Plans - Schedule of RSUs (Details) - RSUs	3 Months Ended
	Jun. 30, 2017 $ / shares shares
DXC Employee Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	3,710,985
Equity instruments other than options nonvested - granted (in shares) | shares	1,231,656
Equity instruments other than options nonvested - HPE RSUs converted to DSC RSUs due to Merger (in shares) | shares	95,302
Equity instruments other than options nonvested - options converted to RSU due to Merger (in shares) | shares	609,416
Equity instruments other than options nonvested - settled (in shares) | shares	(1,795,025)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	(55,860)
Equity instruments other than options nonvested - ending balance (in shares) | shares	3,796,474
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 34.86
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	77.12
Weighted average fair value other than options - HPE RSUs converted to DSC RSUs due to Merger (in dollars per share) | $ / shares	69.30
Weighted average fair value other than options - options converted to RSU due to merger (in dollars per share) | $ / shares	32.58
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	34.91
Weighted average fair value other than options - canceled/forfeited (in dollars per share) | $ / shares	38.36
Weighted average fair value other than options - ending balance (in dollars per share) | $ / shares	$ 48.99
DXC Director Equity Plan
Number of Shares
Equity instruments other than options nonvested - beginning balance (in shares) | shares	85,766
Equity instruments other than options nonvested - granted (in shares) | shares	4,500
Equity instruments other than options nonvested - HPE RSUs converted to DSC RSUs due to Merger (in shares) | shares	0
Equity instruments other than options nonvested - options converted to RSU due to Merger (in shares) | shares	0
Equity instruments other than options nonvested - settled (in shares) | shares	(19,500)
Equity instruments other than options nonvested - canceled/forfeited (in shares) | shares	0
Equity instruments other than options nonvested - ending balance (in shares) | shares	70,766
Weighted Average Grant Date Fair Value
Weighted average fair value other than options - beginning balance (in dollars per share) | $ / shares	$ 34.19
Weighted average fair value other than options - granted (in dollars per share) | $ / shares	80.53
Weighted average fair value other than options - HPE RSUs converted to DSC RSUs due to Merger (in dollars per share) | $ / shares	0.00
Weighted average fair value other than options - options converted to RSU due to merger (in dollars per share) | $ / shares	0.00
Weighted average fair value other than options - settled (in dollars per share) | $ / shares	44.57
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	$ 34.28