Restatement and Adjustment of Consolidated Financial Statements - Consolidated Statement of Operations (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2011	Mar. 28, 2014	Mar. 29, 2013	Mar. 30, 2012	Apr. 01, 2011	Apr. 02, 2010	Apr. 03, 2009
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		$ 12,998	$ 14,195	$ 14,673
Cost of Services		9,272	11,293	12,643
Cost of services - specified contract charge				0
Costs of services - settlement charge (excludes amount charged to revenue of $42)	227	0	0	227
Selling, General and Administrative Expense		(1,220)	(1,197)	(1,145)
Depreciation and amortization		1,018	1,070	1,139
Goodwill impairment		0	0	232
Restructuring costs		76	264	140
Interest expense		147	183	171
Interest income		(16)	(22)	(38)
Other expense (income), net		18	(25)	6
Total costs and expenses		11,735	13,960	15,665
Income (loss) from continuing operations before taxes		1,263	235	(992)
Taxes on income		(383)	62	228
Income from continuing operations, net of tax		880	297	(764)
Income from discontinued operations, net of taxes		88	482	162
Net income (loss)		968	779	(602)
Net income attributable to noncontrolling interest, net of tax		21	19	14
Net income (loss) attributable to CSC common stockholders		947	760	(616)
Continuing operations (in dollars per share)		$ 5.81	$ 1.80	$ (5.02)
Discontinued operations (in dollars per share)		$ 0.60	$ 3.12	$ 1.05
Basic EPS (in dollars per share)		$ 6.41	$ 4.92	$ (3.97)
Continuing operations (in dollars per share)		$ 5.70	$ 1.79	$ (5.02)
Discontinued operations (in dollars per share)		$ 0.58	$ 3.10	$ 1.05
Diluted EPS (in dollars per share)		$ 6.28	$ 4.89	$ (3.97)
Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss) attributable to CSC common stockholders				(616)
Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues				68	5	(38)	(35)
Cost of Services				(36)	(17)	22	25
Selling, General and Administrative Expense				(1)	0	2	0
Depreciation and amortization				(2)	3	(1)	0
Interest expense				(3)	0	2	(1)
Other expense (income), net				2	0	0	(2)
Income (loss) from continuing operations before taxes				106	19	(59)	(57)
Pension and Intercompany Accounting Policy Change [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		0	0	0
Cost of Services		(295)	193	365
Cost of services - specified contract charge				0
Costs of services - settlement charge (excludes amount charged to revenue of $42)				0
Selling, General and Administrative Expense		58	(21)	(36)
Depreciation and amortization		0	0	0
Goodwill impairment				0
Restructuring costs		0	0	0
Interest expense		0	0	0
Interest income		0	0	0
Other expense (income), net		0	0	0
Total costs and expenses		(353)	214	401
Income (loss) from continuing operations before taxes		353	(214)	(401)
Taxes on income		(94)	13	127
Income from continuing operations, net of tax		259	(201)	(274)
Income from discontinued operations, net of taxes		19	1	(4)
Net income (loss)		278	(200)	(278)
Net income attributable to noncontrolling interest, net of tax		5	1	(3)
Net income (loss) attributable to CSC common stockholders		273	(201)	(275)
Continuing operations (in dollars per share)		$ 1.72	$ (1.31)	$ (1.75)
Discontinued operations (in dollars per share)		$ 0.13	$ 0.01	$ (0.02)
Basic EPS (in dollars per share)		$ 1.85	$ (1.30)	$ (1.77)
Continuing operations (in dollars per share)		$ 1.69	$ (1.30)	$ (1.75)
Discontinued operations (in dollars per share)		$ 0.12	$ 0.01	$ (0.02)
Diluted EPS (in dollars per share)		$ 1.81	$ (1.29)	$ (1.77)
Miscellaneous errors [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues				14,673
Cost of Services				12,278
Cost of services - specified contract charge				0
Costs of services - settlement charge (excludes amount charged to revenue of $42)				227
Selling, General and Administrative Expense				(1,109)
Depreciation and amortization				1,139
Goodwill impairment				232	2,511
Restructuring costs				140
Interest expense				171
Interest income				(38)
Other expense (income), net				6
Total costs and expenses				15,264
Income (loss) from continuing operations before taxes				(591)
Taxes on income				101
Income from continuing operations, net of tax				(490)
Income from discontinued operations, net of taxes				166
Net income (loss)				(324)
Net income attributable to noncontrolling interest, net of tax				17
Net income (loss) attributable to CSC common stockholders				(341)
Continuing operations (in dollars per share)				$ (3.27)
Discontinued operations (in dollars per share)				$ 1.07
Basic EPS (in dollars per share)				$ (2.20)
Continuing operations (in dollars per share)				$ (3.27)
Discontinued operations (in dollars per share)				$ 1.07
Diluted EPS (in dollars per share)				$ (2.20)
Miscellaneous errors [Member] | Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		12,998	14,195	14,476
Cost of Services		9,567	11,100	12,181
Cost of services - specified contract charge				1,281
Costs of services - settlement charge (excludes amount charged to revenue of $42)				227
Selling, General and Administrative Expense		(1,278)	(1,176)	(1,108)
Depreciation and amortization		1,018	1,070	1,141
Goodwill impairment				2,745	0
Restructuring costs		76	264	140
Interest expense		147	183	174
Interest income		(16)	(22)	(38)
Other expense (income), net		18	(25)	4
Total costs and expenses		12,088	13,746	18,963
Income (loss) from continuing operations before taxes		910	449	(4,487)
Taxes on income		(289)	49	96
Income from continuing operations, net of tax		621	498	(4,391)
Income from discontinued operations, net of taxes		69	481	166
Net income (loss)		690	979	(4,225)
Net income attributable to noncontrolling interest, net of tax		16	18	17
Net income (loss) attributable to CSC common stockholders		674	961	(4,242)
Continuing operations (in dollars per share)		$ 4.09	$ 3.11	$ (28.44)
Discontinued operations (in dollars per share)		$ 0.47	$ 3.11	$ 1.07
Basic EPS (in dollars per share)		$ 4.56	$ 6.22	$ (27.37)
Continuing operations (in dollars per share)		$ 4.01	$ 3.09	$ (28.44)
Discontinued operations (in dollars per share)		$ 0.46	$ 3.09	$ 1.07
Diluted EPS (in dollars per share)		$ 4.47	$ 6.18	$ (27.37)
Miscellaneous errors [Member] | Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues				197
Cost of Services				97
Cost of services - specified contract charge				(1,281)
Costs of services - settlement charge (excludes amount charged to revenue of $42)				0
Selling, General and Administrative Expense				(1)
Depreciation and amortization				(2)
Goodwill impairment				(2,513)	2,511
Restructuring costs				0
Interest expense				(3)
Interest income				0
Other expense (income), net				2
Total costs and expenses				(3,699)
Income (loss) from continuing operations before taxes				3,896
Taxes on income				5
Income from continuing operations, net of tax				3,901
Income from discontinued operations, net of taxes				0
Net income (loss)				3,901
Net income attributable to noncontrolling interest, net of tax				0
Change in net income				$ (3,901)
Continuing operations (in dollars per share)				$ 25.17
Discontinued operations (in dollars per share)				$ 0.00
Basic EPS (in dollars per share)				$ 25.17
Continuing operations (in dollars per share)				$ 25.17
Discontinued operations (in dollars per share)				$ 0.00
Diluted EPS (in dollars per share)				$ 25.17