Investigations and Out of Period Adjustments (Impact on Income from Continuing Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jul. 04, 2014	Jun. 28, 2013
Adjustments Decrease
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Accounts receivable		$ 2
Software	1
Other assets	3
Accrued payroll and related costs		6
Accrued expenses and other current liabilities	13	16
Adjustments Increase
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Accounts receivable	5
Prepaid expenses and other current assets		10
Software		4
Other assets		5
Deferred Revenue	$ 2	$ 21

Accounts receivable

No definition available.

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Balance Type:	debit
Period Type:	duration

- Definition

Accrued expenses

+ References

No definition available.

+ Details

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Namespace Prefix:	csc_
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Balance Type:	credit
Period Type:	duration

- Definition

Sum of the amounts paid in advance for capitalized costs which will be expensed with the passage of time or the occurrence of a triggering event; and, the aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet due to materiality considerations. Prepaid expenses and current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

+ References

No definition available.

+ Details

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

- Definition

Total increases or decreases in capitalized computer software costs for period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

+ Details

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Period Type:	duration

- Definition

The increase (decrease) during the reporting period, excluding the portion taken into income, in the liability reflecting revenue yet to be earned for which cash or other forms of consideration was received or recorded as a receivable.

+ 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 (a)

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

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase (decrease) during the reporting period in the aggregate amount of obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits.

+ References

+ Details

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

- Definition

The increase (decrease) during the reporting period in other assets used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets, other noncurrent assets, or a combination of other current and noncurrent assets.

+ References

+ Details

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

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration