XML 22 R46.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Changes in Carrying Amount of Goodwill (Parenthetical) (Detail) (Maximum) | 12 Months Ended
--- | ---
Dec. 31, 2014
Maximum |
Goodwill [Line Items] |
Preliminary purchase price allocation period | 1 year

X
- Definition Maximum purchase price allocation period. + References No definition available. + Details
Name: | aciw_PreliminaryPurchasePriceAllocationPeriod
Namespace Prefix: | aciw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration