Defined Benefit Pension Plan Accounting Policy Change Impact on Consolidatd Statement of Operations (Details) (USD $)	3 Months Ended		6 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs of services (excludes depreciation and amortization and restructuring costs)	$ 2,207,000,000	$ 2,317,000,000	$ 4,571,000,000	$ 4,754,000,000
Selling, general and administrative	346,000,000	314,000,000	690,000,000	602,000,000
Income from continuing operations before taxes	245,000,000	239,000,000	459,000,000	473,000,000
Taxes on income	68,000,000	77,000,000	123,000,000	150,000,000
Income from continuing operations	177,000,000	162,000,000	336,000,000	323,000,000
(Loss) income from discontinued operations, net of taxes	(21,000,000)	80,000,000	(29,000,000)	96,000,000
Net income	156,000,000	242,000,000	307,000,000	419,000,000
Net income attributable to noncontrolling interest, net of tax	5,000,000	10,000,000	10,000,000	13,000,000
Net income attributable to CSC common stockholders	151,000,000	232,000,000	297,000,000	406,000,000
Diluted EPS - Continuing operations (in dollars per share)	$ 1.20	$ 1.03	$ 2.26	$ 2.09
Basic EPS - Discontinued Operations (in dollars per share)	$ (0.15)	$ 0.54	$ (0.20)	$ 0.64
Diluted EPS - Continuing operations (in dollars per share)	$ 1.18	$ 1.01	$ 2.22	$ 2.05
Diluted EPS - Discontinued operations (in dollars per share)	$ (0.14)	$ 0.53	$ (0.20)	$ 0.63
Previous accounting methods
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs of services (excludes depreciation and amortization and restructuring costs)	2,226,000,000		4,608,000,000	4,794,000,000
Selling, general and administrative	348,000,000		695,000,000	608,000,000
Income from continuing operations before taxes	224,000,000		417,000,000	427,000,000
Taxes on income	62,000,000		112,000,000	136,000,000
Income from continuing operations	162,000,000		305,000,000	291,000,000
(Loss) income from discontinued operations, net of taxes				77,000,000
Net income	141,000,000		276,000,000	368,000,000
Net income attributable to CSC common stockholders	136,000,000		266,000,000	359,000,000
Diluted EPS - Continuing operations (in dollars per share)	$ 1.10		$ 2.04	$ 1.89
Basic EPS - Discontinued Operations (in dollars per share)				$ 0.52
Diluted EPS - Continuing operations (in dollars per share)	$ 1.07		$ 2.01	$ 1.86
Previous accounting methods | As previously reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Costs of services (excludes depreciation and amortization and restructuring costs)		2,338,000,000
Selling, general and administrative		316,000,000
Income from continuing operations before taxes		216,000,000
Taxes on income		70,000,000
Income from continuing operations		146,000,000
(Loss) income from discontinued operations, net of taxes		63,000,000
Net income		209,000,000	276,000,000	368,000,000
Net income attributable to noncontrolling interest, net of tax		6,000,000		9,000,000
Net income attributable to CSC common stockholders		203,000,000
Diluted EPS - Continuing operations (in dollars per share)		$ 0.95
Basic EPS - Discontinued Operations (in dollars per share)		$ 0.42
Diluted EPS - Continuing operations (in dollars per share)		$ 0.93
Diluted EPS - Discontinued operations (in dollars per share)		$ 0.41		$ 0.51
Impact of change in accounting methods
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change on equity from application of new accounting policy	1,500,000,000		1,500,000,000
Costs of services	(19,000,000)	(21,000,000)	(37,000,000)	(40,000,000)
Selling, general and administrative expenses	(2,000,000)	(2,000,000)	(5,000,000)	(6,000,000)
Income from continuing operations, before taxes	21,000,000	23,000,000	42,000,000	46,000,000
Taxes on income	6,000,000	7,000,000	11,000,000	14,000,000
Income from continuing operations	15,000,000	16,000,000	31,000,000	32,000,000
Income from discontinued operations, net of taxes		17,000,000		19,000,000
Net income	15,000,000	33,000,000	31,000,000	51,000,000
Net income attributable to noncontrolling interest, net of tax		4,000,000		4,000,000
Net income attributable to CSC common stockholders	$ 15,000,000	$ 29,000,000	$ 31,000,000	$ 47,000,000
Diluted EPS - Continuing operations (in dollars per share)	$ 0.10	$ 0.08	$ 0.22	$ 0.20
Basic EPS - Discontinued Operations (in dollars per share)		$ 0.12		$ 0.12
Diluted EPS - Continuing operations (in dollars per share)	$ 0.11	$ 0.08	$ 0.21	$ 0.19
Diluted EPS - Discontinued operations (in dollars per share)		$ 0.12		$ 0.12