Stock Incentive Plans (Tables)

6 Months Ended

Sep. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share Based Compensation Shares Authorized Under Stock Option Plans

The Board has reserved for issuance shares of DXC common stock, par value $0.01 per share, under each of the plans as detailed below:

	As of September 30, 2017
	Reserved for issuance	Available for future grants
DXC Employee Equity Plan	34,200,000	22,460,616
DXC Director Equity Plan	230,000	121,334
DXC Share Purchase Plan	250,000	250,000
Total	34,680,000	22,831,950

Disclosure of Share Based Compensation Arrangements by Share Based Payment Award

	Number of Option Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)
Outstanding as of March 31, 2017	4,767,396		$	38.70	8.01	$	145
HPE options converted to DXC options at Merger	2,654,872		$	46.56
CSC Options converted to RSUs due to Merger	(1,521,519	)	$	51.00
Exercised	(1,818,441	)	$	39.10		$	74
Canceled/Forfeited	(1,214	)	$	68.20
Expired	(35,987	)	$	43.23
Outstanding as of September 30, 2017	4,045,107		$	39.01	5.83	$	190
Vested and expected to vest in the future as of September 30, 2017	4,037,125		$	38.96	5.83	$	189
Exercisable as of September 30, 2017	3,992,228		$	38.70	5.81	$	188

	Employee Equity Plan				Director Equity Plan
	Number of Shares		Weighted Average Grant Date Fair Value		Number of Shares		Weighted Average Grant Date Fair Value
Outstanding as of March 31, 2017	3,710,985		$	34.86	85,766		$	34.19
Granted	1,439,433		$	77.90	22,900		$	84.40
HPE RSUs converted to DXC RSUs due to Merger	95,568		$	69.32	—		$	—
Options converted to RSUs due to Merger	609,416		$	32.58	—		$	—
Settled	(1,890,233	)	$	35.58	(38,800	)	$	46.14
Canceled/Forfeited	(104,174	)	$	45.79	—		$	—
Outstanding as of September 30, 2017	3,860,995		$	50.75	69,866		$	44.02

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

	Three Months Ended				Six Months Ended
(in millions)	September 30, 2017		September 30, 2016		September 30, 2017		September 30, 2016
Total share-based compensation cost	$	17	$	21	$	57	$	35
Related income tax benefit	$	6	$	6	$	19	$	11
Total intrinsic value of options exercised	$	45	$	10	$	74	$	54
Tax benefits from exercised stock options and awards	$	18	$	7	$	53	$	26