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v3.23.3

Commitments - Additional Information (Details) | 12 Months Ended
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Sep. 30, 2023 executive
Commitments and Contingencies Disclosure [Abstract] |
Number of executives in a management agreement providing for certain payments and other benefits in the event of a qualified change | 19

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- Definition Number Of Executives Included In Plan + References No definition available. + Details
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Namespace Prefix: | fico_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration