XML 95 R80.htm IDEA: XBRL DOCUMENT
v3.20.4

Employee Benefit Plans - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
ACI 401(k) Plan |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, maximum annual contribution per employee, percentage | 75.00% |  |
Defined contribution plan, employer matching contribution, percentage of match | 100.00% |  |
Defined contribution plan, employer matching contribtuion, percent of eligible participant contributions | 4.00% |  |
Defined contribution plan, employer matching contribution, maximum amount per employee | $ 5,000 |  |
Defined contribution plan, cost | 6,300,000 | $ 6,400,000 | $ 6,400,000
ACI 401(k) Plan | Employees under Age 50 |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, maximum annual contribution per employee, amount | 19,500 |  |
ACI 401(k) Plan | Employees Aged 50 or Older |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, maximum annual contribution per employee, amount | $ 26,000 |  |
ACI 401(k) Plan | Second Eligible Participant Contributions |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer matching contribution, percentage of match | 50.00% |  |
ACI 401(k) Plan | Second Eligible Participant Contributions | Maximum |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer matching contribtuion, percent of eligible participant contributions | 4.00% |  |
ACI Worldwide EMEA Group Personal Pension Scheme |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, cost | $ 1,500,000 | $ 1,500,000 | $ 1,600,000
ACI Worldwide EMEA Group Personal Pension Scheme | Employed at December 1, 2000 |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer discretionary contribution, percentage of eligible compensation | 8.50% |  |
ACI Worldwide EMEA Group Personal Pension Scheme | Employees Aged Over 55 Years on December 1, 2000 | Maximum |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer discretionary contribution, percentage of eligible compensation | 15.50% |  |
ACI Worldwide EMEA Group Personal Pension Scheme | Employed Subsequent to December 1, 2000 | Minimum |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer discretionary contribution, percentage of eligible compensation | 6.00% |  |
ACI Worldwide EMEA Group Personal Pension Scheme | Employed Subsequent to December 1, 2000 | Maximum |  |  |
Schedule Of Defined Contribution Plans Disclosures [Line Items] |  |  |
Defined contribution plan, employer discretionary contribution, percentage of eligible compensation | 10.00% |  |

X
- Definition Percentage of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | aciw_DefinedContributionPlanEmployerDiscretionaryContributionPercentage
Namespace Prefix: | aciw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum amount matched by the employer, per employee, under a defined contribution plan. + References No definition available. + Details
Name: | aciw_DefinedContributionPlanEmployerMatchingContributionMaximumAmountPerEmployee
Namespace Prefix: | aciw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Schedule Of Defined Contribution Plans Disclosures [Line Items] + References No definition available. + Details
Name: | aciw_ScheduleOfDefinedContributionPlansDisclosuresLineItems
Namespace Prefix: | aciw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aciw_RetirementPlanSpecificationsAxis=aciw_EmployeesUnderAgeFiftyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aciw_RetirementPlanSpecificationsAxis=aciw_EmployeesTurningAgeFiftyOrMoreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aciw_RetirementPlanSpecificationsAxis=aciw_SecondEligibleParticipantContributionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aciw_RetirementPlanSpecificationsAxis=aciw_EmployeeHiredPriorToDecemberOneTwoThousandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aciw_RetirementPlanSpecificationsAxis=aciw_EmployeesAgedOverFiftyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | aciw_RetirementPlanSpecificationsAxis=aciw_EmployeeHiredAfterDecemberOneTwoThousandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |