XML 51 R12.htm IDEA: XBRL DOCUMENT
v3.25.3

Funds held for clients | 12 Months Ended
--- | ---
Sep. 30, 2025
Subclassifications of assets, liabilities and equities [abstract] |
Funds held for clients | Funds held for clients
| As at September 30, 2025 | As at September 30, 2024
| $ | $
Cash (Note 32) | 704,503 |  | 233,584 |
Short-term investments | 33,001 |  | 50,000 |
Long-term bonds (Note 32) | 240,932 |  | 223,196 |
| 978,436 |  | 506,780 |

X
- Definition Disclosure Of Funds Held For Clients [Text Block] + References No definition available. + Details
Name: | gib_DisclosureOfFundsHeldForClientsTextBlock
Namespace Prefix: | gib_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration