XML 184 R98.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Financial Instrument Risk Management - Changes in Allowances for Losses (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Mortgages:    
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Allowance account for credit losses of financial assets, beginning balance $ 25 $ 22
Provision for (reversal of) losses 46 3
Write-offs, net of recoveries, and other adjustments   (2)
Foreign exchange rate movements (1) 2
Allowance account for credit losses of financial assets, ending balance 70 25
Loans    
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Allowance account for credit losses of financial assets, beginning balance 50 28
Provision for (reversal of) losses   19
Provision for (reversal of) losses (1)  
Write-offs, net of recoveries, and other adjustments   0
Foreign exchange rate movements (2) 3
Allowance account for credit losses of financial assets, ending balance 47 50
Mortgages and loans(1)    
Reconciliation of changes in allowance account for credit losses of financial assets [abstract]    
Allowance account for credit losses of financial assets, beginning balance 75 50
Provision for (reversal of) losses 45 22
Write-offs, net of recoveries, and other adjustments   (2)
Foreign exchange rate movements (3) 5
Allowance account for credit losses of financial assets, ending balance $ 117 $ 75