Investigations and Out of Period Adjustments (Cumulative effect on net loss attributable to common shareholders of the consolidated out of period adjustments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013	Mar. 30, 2012	Mar. 30, 2012	Dec. 30, 2011	Sep. 30, 2011	Jul. 01, 2011
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Income from continuing operations, net of tax	$ 859	$ 278	$ (778)
Taxes on income	383	(62)	(228)
Net income (loss) attributable to CSC common stockholders	947	760	(616)
Fiscal 2012
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest			(22)	(7)	(9)	(4)	(2)
Taxes on income			4	4	0	0	0
Other Income Tax Benefit Adjustments			0	0	0	0	0
Net income (loss) attributable to CSC common stockholders			(18)	(3)	(9)	(4)	(2)
NPS Contract [Member] | Fiscal 2012
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Income from continuing operations, net of tax			(6)	(6)	0	0	0
Other errors | Fiscal 2012
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Income from continuing operations, net of tax			$ (16)	$ (1)	$ (9)	$ (4)	$ (2)