XML 127 R85.htm IDEA: XBRL DOCUMENT
v3.23.3

Long-term debt - Long-term debt (Details) | 12 Months Ended |
--- | --- | ---
Sep. 30, 2023 CAD ($) tranche payment | Sep. 30, 2023 USD ($) tranche payment | Sep. 30, 2022 CAD ($) | Sep. 30, 2023 USD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings | $ 3,100,321,000 |  | $ 3,267,034,000 |
Current portion | 1,158,971,000 |  | 93,447,000 |
Long-term debt | 1,941,350,000 |  | 3,173,587,000 |
Repayments of borrowings | 79,150,000 |  | 401,654,000 |
Settled cross-currency swap agreement |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | 69,300,000 |  |  |
2014 U.S. Senior Notes |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings | $ 473,808,000 |  | $ 550,177,000 |
Borrowings, number of tranches | tranche | 2 | 2 |  |
Borrowings, number of yearly payments | payment | 7 | 7 |  |
2014 U.S. Senior Notes | Tranche six |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Repayments of borrowings |  | $ 50,000,000 |  |
2014 U.S. Senior Notes | Less than one year | Remaining total tranches |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | $ 473,830,000 |  |  | $ 350,000,000
2014 U.S. Senior Notes | Gross carrying amount |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | $ 473,830,000 |  |  |
2014 U.S. Senior Notes | Weighted average |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings, maturity term | 1 year | 1 year |  |
Borrowings, interest rate | 4.01% |  | 3.98% | 4.01%
2014 U.S. Senior Notes | Settled cross-currency swap agreement | Tranche six |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Repayments of borrowings | $ 67,765,000 |  |  |
2021 U.S. Senior Notes |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings | $ 1,342,714,000 |  | $ 1,361,974,000 |
Borrowings, number of tranches | tranche | 2 | 2 |  |
2021 U.S. Senior Notes | Later than one year and not later than five years |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | $ 812,280,000 |  |  | $ 600,000,000
2021 U.S. Senior Notes | Beyond five years |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | 541,520,000 |  |  | $ 400,000,000
2021 U.S. Senior Notes | Gross carrying amount |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | $ 1,353,800,000 |  |  |
2021 U.S. Senior Notes | Weighted average |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings, maturity term | 5 years | 5 years |  |
Borrowings, interest rate | 1.79% |  |  | 1.79%
2021 CAD Senior Notes |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings | $ 596,550,000 |  | 595,900,000 |
Borrowings, interest rate | 2.10% |  |  | 2.10%
2021 CAD Senior Notes | Later than one year and not later than five years |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities |  |  |  | $ 600,000,000
2021 CAD Senior Notes | Gross carrying amount |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | $ 600,000,000 |  |  |
Unsecured committed term loan credit facility |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings | 676,886,000 |  | 687,705,000 |
Unsecured committed term loan credit facility | Gross carrying amount |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Notional amount of financial liabilities | $ 676,900,000 |  |  |
Unsecured committed term loan credit facility | LIBOR | Weighted average |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings, interest rate | 6.43% |  |  | 6.43%
Other long-term debt |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings | $ 10,363,000 |  | $ 71,278,000 |

X
- Definition Borrowings, Maturity Term + References No definition available. + Details
Name: | gib_BorrowingsMaturityTerm
Namespace Prefix: | gib_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Notional Amount Of Financial Liabilities + References No definition available. + Details
Name: | gib_NotionalAmountOfFinancialLiabilities
Namespace Prefix: | gib_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number Of Annual Repayments On Borrowings + References No definition available. + Details
Name: | gib_NumberOfAnnualRepaymentsOnBorrowings
Namespace Prefix: | gib_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_7&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CurrentPortionOfLongtermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The non-current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_LongtermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 17 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_17_d&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_HedgingInstrumentsAxis=gib_CrossCurrencySwapAgreementsSettledMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=gib_A2014USUnsecuredSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | gib_TranchesOfRepaymentsOfBorrowingsAxis=gib_RepaymentsOfBorrowingsTrancheSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | gib_TranchesOfRepaymentsOfBorrowingsAxis=gib_RepaymentsOfBorrowingsTotalRemainingTranchesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=gib_A2021USUnsecuredSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=gib_A2021CADUnsecuredSeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=gib_UnsecuredCommittedTermLoanCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=gib_LIBORMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=gib_OtherLongTermBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |