v3.25.4
Goodwill and Intangible Assets - Change in Carrying Value of Goodwill and Intangible Assets (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Nov. 30, 2025
Aug. 31, 2025
Apr. 30, 2024
Reconciliation of changes in intangible assets and goodwill [abstract]          
Goodwill at beginning of period $ 6,275 $ 5,919      
Intangible assets at beginning of period 4,777 4,391      
Intangible assets and goodwill at beginning of period 11,052 10,310      
Net additions / (disposals), goodwill 739 150      
Net additions / (disposals), intangible assets 1,197 508      
Net additions / (disposals), goodwill and intangible assets 1,936 658      
Amortization expense (364) (374)      
Effect of changes in foreign exchange rates (137) 206      
Effect of changes in foreign exchange rates, intangible assets (163) 252      
Effect of changes in foreign exchange rates, goodwill and intangible assets (300) 458      
Goodwill at end of period 6,877 6,275      
Intangible assets at end of period 5,447 4,777      
Goodwill and intangible assets at end of period 12,324 11,052      
CQS Management Limited          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Percentage of voting equity interests acquired     75.00%   100.00%
Goodwill         $ 150
Consideration         334
Contingent consideration         8
Acquired of insurance licenses       $ 15  
Comvest Credit Partners Acquisition          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Goodwill at end of period 739        
Goodwill and intangible assets at end of period 735        
Goodwill     $ 739    
Consideration 1,328        
Canada WAM          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Goodwill at beginning of period 1,436 1,436      
Net additions / (disposals), goodwill 0 0      
Effect of changes in foreign exchange rates 0 0      
Goodwill at end of period 1,436 1,436      
U.S. WAM          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Goodwill at beginning of period 1,521 1,250      
Net additions / (disposals), goodwill 739 150      
Effect of changes in foreign exchange rates (73) 121      
Goodwill at end of period 2,187 1,521      
Distribution networks          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 840 834      
Net additions / (disposals), intangible assets 59 13      
Amortization expense (69) (56)      
Effect of changes in foreign exchange rates, intangible assets (38) 49      
Intangible assets at end of period 792 840      
Gross carrying amount of finite life intangible assets 1,611 1,617      
Customer relationships          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 542 582      
Net additions / (disposals), intangible assets 280 0      
Amortization expense (34) (52)      
Effect of changes in foreign exchange rates, intangible assets (14) 12      
Intangible assets at end of period 774 542      
Gross carrying amount of finite life intangible assets 1,417 1,156      
Customer relationships | Comvest Credit Partners Acquisition          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Identifiable intangible assets recognised as of acquisition date     280    
Software          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 1,212 1,102      
Net additions / (disposals), intangible assets 385 329      
Amortization expense (254) (257)      
Effect of changes in foreign exchange rates, intangible assets (32) 38      
Intangible assets at end of period 1,311 1,212      
Gross carrying amount of finite life intangible assets 3,703 3,408      
Fund management contracts and other          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 59 48      
Net additions / (disposals), intangible assets 277 7      
Amortization expense (7) (9)      
Effect of changes in foreign exchange rates, intangible assets (2) 13      
Intangible assets at end of period 327 59      
Gross carrying amount of finite life intangible assets 434 156      
Finite life intangible assets          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 2,653 2,566      
Net additions / (disposals), intangible assets 1,001 349      
Amortization expense (364) (374)      
Effect of changes in foreign exchange rates, intangible assets (86) 112      
Intangible assets at end of period 3,204 2,653      
Finite life intangible assets | CQS Management Limited          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Identifiable intangible assets recognised as of acquisition date         7
Brand          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 866 791      
Net additions / (disposals), intangible assets 21 3      
Effect of changes in foreign exchange rates, intangible assets (43) 72      
Intangible assets at end of period 844 866      
Brand | CQS Management Limited          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Identifiable intangible assets recognised as of acquisition date         3
Brand | Comvest Credit Partners Acquisition          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Identifiable intangible assets recognised as of acquisition date     21    
Fund management contracts and other          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 1,258 1,034      
Net additions / (disposals), intangible assets 175 156      
Effect of changes in foreign exchange rates, intangible assets (34) 68      
Intangible assets at end of period 1,399 1,258      
Fund management contracts and other | Canada WAM          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 273        
Intangible assets at end of period 273 273      
Fund management contracts and other | U.S. WAM          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 421        
Intangible assets at end of period 545 421      
Indefinite life intangible assets          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Intangible assets at beginning of period 2,124 1,825      
Net additions / (disposals), intangible assets 196 159      
Effect of changes in foreign exchange rates, intangible assets (77) 140      
Intangible assets at end of period $ 2,243 $ 2,124      
Indefinite life intangible assets | CQS Management Limited          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Identifiable intangible assets recognised as of acquisition date         $ 153
Indefinite life intangible assets | Comvest Credit Partners Acquisition          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Identifiable intangible assets recognised as of acquisition date     144    
Fund management contracts and other | Comvest Credit Partners Acquisition          
Reconciliation of changes in intangible assets and goodwill [abstract]          
Identifiable intangible assets recognised as of acquisition date     $ 290