Name:	ca_AdvancedPaymentsfromGovernmentCustomerswithTerminationforConvenienceRights
Namespace Prefix:	ca_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

General payment terms to customers.

No definition available.

Name:	ca_GeneralPaymentTerms
Namespace Prefix:	ca_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

[Line Items] for Revenue from Contracts with Customers, Other [Table]

No definition available.

Name:	ca_RevenuefromContractswithCustomersOtherLineItems
Namespace Prefix:	ca_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount represents the remaining unbilled contract value and performance obligations in government customer contracts with termination for convenience clauses, which is not included in the allocation of transaction price and not included in the deferred revenue.

No definition available.

Name:	ca_UnbilledValueofGovernmentContractswithTerminationforConvenienceClauses
Namespace Prefix:	ca_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The value relationship used to allocate consideration between the license and maintenance performance obligations is derived from the observable relationship of the selling price of a standalone maintenance renewal to the related perpetual license fee, which is generally 20% of the net license fee for one year of maintenance. Bundles of term license and maintenance are separated using the same observable value relationship as in perpetual license and maintenance bundles. Arrangements that include more than one year of maintenance use a value relationship which reflects an annual maintenance rate of 20% of the total value ascribed to the right to use the software. As a result, a greater portion of the bundle relates to maintenance as the length of the maintenance period included in the bundle increases.

No definition available.

Name:	ca_ValueRelationshiptoAllocateConsiderationbetweenLicenseandMaintenancePerformanceObligationsAnnualMaintenanceasaPercentageofTotalLicenseFee
Namespace Prefix:	ca_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045