XML 146 R104.htm IDEA: XBRL DOCUMENT
v3.23.3

Capital stock - Narrative (Details) - Capital stock | 12 Months Ended
--- | ---
Sep. 30, 2023 vote
Preferred shares |
Disclosure of classes of share capital [line items] |
Number of votes per share | 1
Class A subordinate voting shares |
Disclosure of classes of share capital [line items] |
Number of votes per share | 1
Class B multiple voting shares |
Disclosure of classes of share capital [line items] |
Number of votes per share | 10

X
- Definition Number Of Votes + References No definition available. + Details
Name: | gib_NumberOfVotes
Namespace Prefix: | gib_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfClassesOfShareCapitalLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_PreferenceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=ifrs-full_IssuedCapitalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=gib_ClassASubordinateVotingSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=gib_ClassBMultipleVotingSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |