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v3.19.3

Guarantees - Additional Information (Details) | 12 Months Ended
--- | ---
Sep. 30, 2019
Maximum |
Product Warranty [Line Items] |
Duration of product warranties | 90 days

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- Definition Product Warranty [Line Items] + References No definition available. + Details
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Namespace Prefix: | fico_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Product Warranty Term + References No definition available. + Details
Name: | fico_ProductWarrantyTerm
Namespace Prefix: | fico_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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