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Right-of-use assets (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | $ 535,121 |
Ending balance | 482,321 | $ 535,121
Properties |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | 439,438 |
Ending balance | 378,889 | 439,438
Motor vehicles and others |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | 91,241 |
Ending balance | 100,701 | 91,241
Computer equipment |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | 4,442 |
Ending balance | 2,731 | 4,442
Cost |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | 1,270,298 | 1,294,314
Additions | 82,685 | 120,067
Additions - business acquisitions |  | 22,114
Change in estimates and lease modifications | 13,940 | (7,946)
Disposals/retirements | (141,583) | (100,250)
Foreign currency translation adjustment | 36,014 | (58,001)
Ending balance | 1,261,354 | 1,270,298
Cost | Properties |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | 1,049,445 | 1,080,867
Additions | 32,772 | 90,830
Additions - business acquisitions |  | 21,622
Change in estimates and lease modifications | 13,940 | (7,946)
Disposals/retirements | (101,670) | (88,546)
Foreign currency translation adjustment | 28,423 | (47,382)
Ending balance | 1,022,910 | 1,049,445
Cost | Motor vehicles and others |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | 180,164 | 174,354
Additions | 48,883 | 25,554
Additions - business acquisitions |  | 492
Change in estimates and lease modifications | 0 | 0
Disposals/retirements | (36,792) | (11,704)
Foreign currency translation adjustment | 7,246 | (8,532)
Ending balance | 199,501 | 180,164
Cost | Computer equipment |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | 40,689 | 39,093
Additions | 1,030 | 3,683
Additions - business acquisitions |  | 0
Change in estimates and lease modifications | 0 | 0
Disposals/retirements | (3,121) | 0
Foreign currency translation adjustment | 345 | (2,087)
Ending balance | 38,943 | 40,689
Accumulated depreciation |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | (735,177) | (708,107)
Disposals/retirements | 129,497 | 82,722
Foreign currency translation adjustment | (20,674) | 35,361
Depreciation expense | 143,030 | 141,295
Impairment | 9,649 | 3,858
Ending balance | (779,033) | (735,177)
Accumulated depreciation | Properties |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | (610,007) | (606,558)
Disposals/retirements | 94,676 | 74,973
Foreign currency translation adjustment | (15,792) | 28,925
Depreciation expense | 103,249 | 103,489
Impairment | 9,649 | 3,858
Ending balance | (644,021) | (610,007)
Accumulated depreciation | Motor vehicles and others |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | (88,923) | (67,975)
Disposals/retirements | 31,700 | 7,749
Foreign currency translation adjustment | (4,589) | 4,563
Depreciation expense | 36,988 | 33,260
Impairment | 0 | 0
Ending balance | (98,800) | (88,923)
Accumulated depreciation | Computer equipment |  |
Reconciliation Of Changes In Right-Of-Use Assets [Abstract] |  |
Beginning balance | (36,247) | (33,574)
Disposals/retirements | 3,121 | 0
Foreign currency translation adjustment | (293) | 1,873
Depreciation expense | 2,793 | 4,546
Impairment | 0 | 0
Ending balance | $ (36,212) | $ (36,247)

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- Definition Acquisitions Through Business Combinations, Right-Of-Use Assets + References No definition available. + Details
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- Definition Change In Estimates And Lease Modifications, Right-Of-Use Assets + References No definition available. + Details
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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_h&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term that do not meet the definition of investment property. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_j&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_a&doctype=Standard -URIDate 2023-03-23 + Details
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