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International Business Machines Corporation Information Technology Outsourcing Agreement - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Jun. 30, 2012
Information Technology Outsourcing Agreement [Line Items] |
Services agreement, expected termination fee | $ 3.0
Services agreement, effective termination date | 2013-01-31

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- Definition Agreement Termination Date + References No definition available. + Details
Name: | aciw_AgreementTerminationDate
Namespace Prefix: | aciw_
Data Type: | us-types:dateStringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | aciw_InformationTechnologyOutsourcingAgreementLineItems
Namespace Prefix: | aciw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual termination fee to be paid by the Company to International Business Machines for the termination of the outsourcing agreement. + References No definition available. + Details
Name: | aciw_OutsourcingAgreementTerminationFee
Namespace Prefix: | aciw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration