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v3.25.3

Commitments, contingencies and guarantees (Tables) | 12 Months Ended
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Sep. 30, 2025
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract] |
Disclosure of minimum payments under long-term service and other agreements | Minimum payments under these agreements are due as follows:
$
Less than one year | 226,509 |
Between one and three years | 214,408 |
Between three and five years | 23,106 |
Beyond five years | — |

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- Definition Disclosure Of Commitments For Long-Term Service And Other Agreements, Explanatory [Table Text Block] + References No definition available. + Details
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- Definition Other Provisions, Contingent Liabilities And Contingent Assets [Abstract] + References No definition available. + Details
Name: | gib_OtherProvisionsContingentLiabilitiesAndContingentAssetsAbstract
Namespace Prefix: | gib_
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