Summary of Significant Accounting Policies - Restatement of Previously Reported Financial Information (Details) - USD ($) $ in Millions		12 Months Ended
		Apr. 01, 2016		Apr. 03, 2015		Mar. 28, 2014		Mar. 29, 2013	Mar. 29, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)		$ (62)	[1]	$ (464)	[2]	$ 174	[2]
Retained earnings		33		928	[3]
Total CSC stockholders' equity		2,025		2,937	[3]
Total equity	[4]	2,032		2,965	[3]	3,950		$ 3,166
Income (loss) from continuing operations		$ 72	[1]	(207)	[2]	520	[2]
Correction of Prior Period Misstatement
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)								$ 6
Retained earnings									$ 6
Restatement Adjustment | Net Understatement in Calculation of Income Tax Benefit
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)				(5)
Restatement Adjustment | Adjustments to Uncertain Tax Positions Resulting in Understatement
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)				(5)		2
Restatement Adjustment | Understatement of Net Income Tax Benefit
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)				(10)
Restatement Adjustment | Understatement in Calculation of Income Tax Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)						1
Restatement Adjustment | Errors in Deferred Tax Accounts
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)						(3)
Restatement Adjustment | Overstatement of Net Income Tax Expense (less than)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax (benefit) expense (less than year ended March 28, 2014)						1
Restatement Adjustment | Correction of Prior Period Misstatement
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total CSC stockholders' equity									6
Total equity									$ 6
Income (loss) from continuing operations				$ 10		$ 1

[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] Certain prior year balances were adjusted to give effect to discontinued operations as described in Note 4, for certain errors in previously issued financial statements related to income taxes as described in Note 1, and for the retrospective application of ASU 2015-17 and ASU 2016-09 as described 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.