Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Apr. 01, 2016		Apr. 03, 2015		Mar. 28, 2014
Net income (loss) attributable to CSC common shareholders:
From continuing operations	$ 71		$ (207)		$ 520
From discontinued operations	180		209		427
Net income attributable to CSC common stockholders	$ 251	[1]	$ 2	[2]	$ 947	[2]
Common share information:
Weighted average common shares outstanding for basic EPS (in shares)	138,280		142,560		147,650
Dilutive effect of stock options and equity awards (in shares)	3,050		0		3,110
Shares for diluted EPS (in shares)	141,330		142,560		150,760
Basic EPS:
Continuing operations (in dollars per share)	$ 0.51	[1]	$ (1.45)	[2]	$ 3.52	[2]
Discontinued operations (in dollars per share)	1.31	[1]	1.46	[2]	2.89	[2]
Total (in dollars per share)	1.82	[1]	0.01	[2]	6.41	[2]
Diluted EPS:
Continuing operations (in dollars per share)	0.50	[1]	(1.45)	[2]	3.45	[2]
Discontinued operations (in dollars per share)	1.28	[1]	1.46	[2]	2.83	[2]
Total (in dollars per share)	$ 1.78	[1]	$ 0.01	[2]	$ 6.28	[2]

[1] Due to the adoption of ASU 2016-09 certain balances related to excess tax benefits from stock compensation were adjusted prospectively as described in Note 1.

[2] Certain prior year balances were adjusted for certain errors in previously issued financial statements related to income taxes as described in Note 1 and to give effect to discontinued operations as described in Note 4.