v3.25.4
Revenue from Service Contracts - Revenue from Service Contracts by Service Lines and Reporting Segments (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers $ 8,129 $ 7,588
Asia, Canada, U.S., and Corporate and Other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 109 149
Global WAM    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 8,020 7,439
Real estate management services included in net investment income    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 276 317
Real estate management services included in net investment income | Asia, Canada, U.S., and Corporate and Other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 276 317
Real estate management services included in net investment income | Global WAM    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 0 0
Other revenue    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 7,931 7,293
Other revenue | Asia, Canada, U.S., and Corporate and Other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers (81) (145)
Other revenue | Global WAM    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 8,012 7,438
Other revenue | Investment management and other related fees    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 3,498 3,123
Other revenue | Investment management and other related fees | Asia, Canada, U.S., and Corporate and Other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers (442) (489)
Other revenue | Investment management and other related fees | Global WAM    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 3,940 3,612
Other revenue | Transaction processing, administration and service fees    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 3,468 3,206
Other revenue | Transaction processing, administration and service fees | Asia, Canada, U.S., and Corporate and Other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 302 298
Other revenue | Transaction processing, administration and service fees | Global WAM    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 3,166 2,908
Other revenue | Distribution fees and other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 965 964
Other revenue | Distribution fees and other | Asia, Canada, U.S., and Corporate and Other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 59 46
Other revenue | Distribution fees and other | Global WAM    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 906 918
Revenue from non-service lines    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 198 295
Revenue from non-service lines | Asia, Canada, U.S., and Corporate and Other    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers 190 294
Revenue from non-service lines | Global WAM    
Disclosure of disaggregation of revenue from contracts with customers [line items]    
Revenue from contracts with customers $ 8 $ 1