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Intangible assets (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | $ 506,793 |
Ending balance | 615,959 | $ 506,793
Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 2,203,586 | 2,253,725
Additions | 137,980 | 114,477
Additions - business acquisitions | 110,647 | 22,107
Disposals/retirements | (63,005) | (107,650)
Foreign currency translation adjustment | (1,788) | (79,073)
Ending balance | 2,387,420 | 2,203,586
Accumulated amortization and impairment |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (1,696,793) | (1,732,263)
Disposals/retirements | 63,005 | 107,650
Foreign currency translation adjustment | 5,626 | 61,802
Amortization expense (Note 24) | 139,940 | 129,861
Impairment (Note 24) | 3,359 | 4,121
Ending balance | (1,771,461) | (1,696,793)
Internal-use software | Acquired |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 6,907 |
Ending balance | 6,340 | 6,907
Internal-use software | Acquired | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 79,210 | 96,900
Additions | 1,385 | 107
Additions - business acquisitions | 3,176 | 0
Disposals/retirements | (6,399) | (16,427)
Foreign currency translation adjustment | (1,410) | (1,370)
Ending balance | 75,962 | 79,210
Internal-use software | Acquired | Accumulated amortization and impairment |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (72,303) | (84,431)
Disposals/retirements | 6,399 | 16,427
Foreign currency translation adjustment | 1,230 | 1,165
Amortization expense (Note 24) | 4,948 | 5,464
Impairment (Note 24) | 0 | 0
Ending balance | (69,622) | (72,303)
Internal-use software | Internally developed |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 45,057 |
Ending balance | 39,163 | 45,057
Internal-use software | Internally developed | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 98,891 | 131,298
Additions | 10,111 | 7,712
Additions - business acquisitions | 0 | 0
Disposals/retirements | (2,647) | (39,284)
Foreign currency translation adjustment | (1,869) | (835)
Ending balance | 104,486 | 98,891
Internal-use software | Internally developed | Accumulated amortization and impairment |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (53,834) | (79,745)
Disposals/retirements | 2,647 | 39,284
Foreign currency translation adjustment | 1,094 | 509
Amortization expense (Note 24) | 14,711 | 13,882
Impairment (Note 24) | 519 | 0
Ending balance | (65,323) | (53,834)
Business solutions | Acquired |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 5,910 |
Ending balance | 5,486 | 5,910
Business solutions | Acquired | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 78,641 | 76,278
Additions | 1,160 | 0
Additions - business acquisitions | 1,630 | 8,081
Disposals/retirements | (2,007) | (3,242)
Foreign currency translation adjustment | (844) | (2,476)
Ending balance | 78,580 | 78,641
Business solutions | Acquired | Accumulated amortization and impairment |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (72,731) | (75,170)
Disposals/retirements | 2,007 | 3,242
Foreign currency translation adjustment | 831 | 2,240
Amortization expense (Note 24) | 3,201 | 3,043
Impairment (Note 24) | 0 | 0
Ending balance | (73,094) | (72,731)
Business solutions | Internally developed |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 259,253 |
Ending balance | 325,723 | 259,253
Business solutions | Internally developed | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 624,850 | 571,015
Additions | 103,309 | 85,572
Additions - business acquisitions | 0 | 0
Disposals/retirements | (28,932) | (9,041)
Foreign currency translation adjustment | 34,794 | (22,696)
Ending balance | 734,021 | 624,850
Business solutions | Internally developed | Accumulated amortization and impairment |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (365,597) | (338,122)
Disposals/retirements | 28,932 | 9,041
Foreign currency translation adjustment | (20,582) | 12,044
Amortization expense (Note 24) | 48,211 | 44,439
Impairment (Note 24) | 2,840 | 4,121
Ending balance | (408,298) | (365,597)
Software licenses |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 43,173 |
Ending balance | 42,961 | 43,173
Software licenses | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 167,374 | 190,372
Additions | 22,015 | 21,086
Additions - business acquisitions | 303 | 0
Disposals/retirements | (23,020) | (39,656)
Foreign currency translation adjustment | (3,694) | (4,428)
Ending balance | 162,978 | 167,374
Software licenses | Accumulated amortization and impairment |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (124,201) | (142,456)
Disposals/retirements | 23,020 | 39,656
Foreign currency translation adjustment | 2,819 | 3,562
Amortization expense (Note 24) | 21,655 | 24,963
Impairment (Note 24) | 0 | 0
Ending balance | (120,017) | (124,201)
Client relationships |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 146,493 |
Ending balance | 196,286 | 146,493
Client relationships | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 1,154,620 | 1,187,862
Additions | 0 | 0
Additions - business acquisitions | 105,538 | 14,026
Disposals/retirements | 0 | 0
Foreign currency translation adjustment | (28,765) | (47,268)
Ending balance | 1,231,393 | 1,154,620
Client relationships | Accumulated amortization and impairment |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (1,008,127) | (1,012,339)
Disposals/retirements | 0 | 0
Foreign currency translation adjustment | 20,234 | 42,282
Amortization expense (Note 24) | 47,214 | 38,070
Impairment (Note 24) | 0 | 0
Ending balance | $ (1,035,107) | $ (1,008,127)

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