Reconciliation of Previously Reported Amounts to Revised and Restated Financial Statements - Consolidated Statement of Operations (Details) - USD ($) $ in Millions		12 Months Ended
		Apr. 01, 2016	[1]	Apr. 03, 2015		Mar. 28, 2014	[2]	Mar. 29, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations, before taxes		$ 10		$ (671)	[2]	$ 694
Income tax (benefit) expense		(62)		(464)	[2]	174
Income (loss) from continuing operations		72		(207)	[2]	520
Income (loss) from discontinued operations		191		224	[2]	448
Net income	[3],[4]	263		17	[2]	968
Net income (loss) attributable to CSC common stockholders		$ 251		2	[2]	$ 947
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations, before taxes				(276)
Income tax (benefit) expense				(312)
Income (loss) from continuing operations				36
Income (loss) from discontinued operations				(29)
Net income				7
Net income (loss) attributable to CSC common stockholders				(8)
Correction of Prior Period Misstatement
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense								$ 6
Correction of Prior Period Misstatement | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations, before taxes				0
Income tax (benefit) expense				(10)
Income (loss) from continuing operations				10
Income (loss) from discontinued operations				0
Net income				10
Net income (loss) attributable to CSC common stockholders				10
Reclassification of Discontinued Operations | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations, before taxes				(395)
Income tax (benefit) expense				(142)
Income (loss) from continuing operations				(253)
Income (loss) from discontinued operations				253
Net income				0
Net income (loss) attributable to CSC common stockholders				$ 0

[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.

[3] Due to the adoption of ASU 2016-09 certain balances related to employee stock-based compensation were adjusted retrospectively as discussed in Note 1 .

[4] Prior year balances were adjusted for certain errors in previously issued financial statements related to income taxes as described in Note 1.