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Intangible Assets - Schedule of Intangible Assets (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | $ 320.4 |
Ending balance | 265.7 | $ 320.4
Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 610.7 | 592.2
Additions | 13.7 | 25.7
Additions arising on acquisitions | 37.6 | 15.3
Removal of fully amortized assets | (112.6) | (44.4)
Disposals |  | (1.4)
Impact of foreign exchange | (8.9) | 23.3
Ending balance | 540.5 | 610.7
Accumulated depreciation |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (290.3) | (218.9)
Amortization | 102.0 | 104.6
Removal of fully amortized assets | 112.6 | 44.4
Impact of foreign exchange | (4.9) | 11.2
Ending balance | (274.8) | (290.3)
Client Relationships |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 256.3 |
Ending balance | 231.4 | 256.3
Client Relationships | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 471.9 | 463.2
Additions | 0.0 | 0.0
Additions arising on acquisitions | 25.2 | 13.1
Removal of fully amortized assets | (25.4) | (24.3)
Disposals |  | 0.0
Impact of foreign exchange | (7.6) | 19.9
Ending balance | 464.1 | 471.9
Client Relationships | Accumulated depreciation |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (215.6) | (185.0)
Amortization | 46.3 | 45.6
Removal of fully amortized assets | 25.4 | 24.3
Impact of foreign exchange | (3.8) | 9.3
Ending balance | (232.7) | (215.6)
Contract Backlog |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 17.2 |
Ending balance | 8.3 | 17.2
Contract Backlog | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 48.6 | 50.2
Additions | 0.0 | 0.0
Additions arising on acquisitions | 12.4 | 1.7
Removal of fully amortized assets | (47.8) | (6.1)
Disposals |  | 0.0
Impact of foreign exchange | (0.8) | 2.8
Ending balance | 12.4 | 48.6
Contract Backlog | Accumulated depreciation |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (31.4) | (2.8)
Amortization | 21.3 | 33.3
Removal of fully amortized assets | 47.8 | 6.1
Impact of foreign exchange | (0.8) | 1.4
Ending balance | (4.1) | (31.4)
Software and other |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 46.9 |
Ending balance | 26.0 | 46.9
Software and other | Cost |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | 90.2 | 78.8
Additions | 13.7 | 25.7
Additions arising on acquisitions | 0.0 | 0.5
Removal of fully amortized assets | (39.4) | (14.0)
Disposals |  | (1.4)
Impact of foreign exchange | (0.5) | 0.6
Ending balance | 64.0 | 90.2
Software and other | Accumulated depreciation |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Beginning balance | (43.3) | (31.1)
Amortization | 34.4 | 25.7
Removal of fully amortized assets | 39.4 | 14.0
Impact of foreign exchange | (0.3) | 0.5
Ending balance | $ (38.0) | $ (43.3)

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