Change In Accounting Estimate, Reduction in Net Income

No definition available.

Name:	csc_ChangeInAccountingEstimateReductioninNetIncome
Namespace Prefix:	csc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Change In Accounting Estimate, Reduction in Operating Income

+ References

No definition available.

+ Details

Name:	csc_ChangeInAccountingEstimateReductionInOperatingIncome
Namespace Prefix:	csc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of total financial guarantees outstanding.

+ References

No definition available.

+ Details

Name:	csc_TotalGuaranteesOutstanding
Namespace Prefix:	csc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.21)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 18

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 20

-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 21

-Article 9

+ Details

Name:	us-gaap_EarningsPerShareDiluted
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of damages paid to the plaintiff in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349

+ Details

Name:	us-gaap_LossContingencyDamagesPaidValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of receivable related to a loss contingency accrual that is expected to be collected within one year or the normal operating cycle, if longer. For example, an insurance recovery receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12053-110248

+ Details

Name:	us-gaap_LossContingencyReceivableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_ChangeInAccountingEstimateByTypeAxis=csc_ContractsAccountedForUnderPercentageOfCompletionUSClaimsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis=csc_MiscellaneousErrorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=csc_LettersOfCreditPerformanceGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=csc_BaintoandHimmelCasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationCaseAxis=csc_UnitedStatesDistrictCourtEasternDistrictOfVirginiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_RestatementAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contengencies (Contingencies) (Details) (USD $)	12 Months Ended			2 Months Ended	0 Months Ended			3 Months Ended	36 Months Ended	12 Months Ended			3 Months Ended
	Mar. 28, 2014	Mar. 29, 2013	Mar. 30, 2012	Jul. 21, 2011 lawsuit	May 15, 2013	Oct. 06, 2013	Aug. 23, 2013	Apr. 01, 2011	Apr. 01, 2011	Apr. 01, 2011	Apr. 02, 2010	Apr. 03, 2009	Jan. 02, 2015	Feb. 14, 2014	Sep. 27, 2013
Loss Contingencies [Line Items]
Operating income (loss)	$ 1,416,000,000us-gaap_OperatingIncomeLoss	$ 961,000,000us-gaap_OperatingIncomeLoss	$ 77,000,000us-gaap_OperatingIncomeLoss
Total Guarantees Outstanding	183,000,000csc_TotalGuaranteesOutstanding
Related receivable, pending corporate insurance claim		45,000,000												34,000,000	61,000,000
Goodwill impairment	0us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss	232,000,000us-gaap_GoodwillImpairmentLoss
Earnings Per Share, Diluted	$ 6.28us-gaap_EarningsPerShareDiluted	$ 4.89us-gaap_EarningsPerShareDiluted	$ (3.97)us-gaap_EarningsPerShareDiluted
Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of pending class action complaints				4
United States District Court, Eastern District of Virginia [Member] \| Pending Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement amount					97,500,000
Bainto and Himmel Cases [Member] \| Pending Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement amount						195,000	2,000,000
Letters of credit
Loss Contingencies [Line Items]
Total Guarantees Outstanding	82,000,000
Contracts Accounted for under Percentage of Completion, U.S. Claims [Member] \| NHS contract [Member]
Loss Contingencies [Line Items]
Change in accounting estimate, reduction in operating income								1,158,000,000	129,000,000
Change in net income			(3,901,000,000)
Restatement Adjustment [Member] \| Contracts Accounted for under Percentage of Completion, U.S. Claims [Member] \| NHS contract [Member]
Loss Contingencies [Line Items]
Operating income (loss)										37,000,000	(35,000,000)	(131,000,000)
Miscellaneous errors [Member]
Loss Contingencies [Line Items]
Goodwill impairment			232,000,000							2,511,000,000
Earnings Per Share, Diluted			$ (2.20)
Miscellaneous errors [Member] \| Restatement Adjustment [Member]
Loss Contingencies [Line Items]
Goodwill impairment			(2,513,000,000)							2,511,000,000
Change in net income			(3,901,000,000)
Earnings Per Share, Diluted			$ 25.17
Miscellaneous errors [Member] \| Scenario, Previously Reported [Member]
Loss Contingencies [Line Items]
Goodwill impairment			2,745,000,000							0
Earnings Per Share, Diluted	$ 4.47	$ 6.18	$ (27.37)
Subsequent Event [Member] \| Contracts Accounted for under Percentage of Completion, U.S. Claims [Member] \| NHS contract [Member]
Loss Contingencies [Line Items]
Litigation settlement amount													(197,000,000)
Penalty related to SEC settlement													$ 190,000,000