v3.25.4
Risk Management - Additional Information (Details)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2025
CAD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CAD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Disclosure of credit risk exposure [line items]          
Long-term debt $ 7,685   $ 6,629    
Unencumbered assets $ 537,400   $ 516,600    
Percentage of equity hedges in the dynamic program offset against hedged variable annuity liability 95.00%   95.00% 95.00% 95.00%
Probability-weighted ECL $ 809   $ 828    
Loaned securities included in invested assets 12,712   11,663    
Reverse repurchase transactions recorded as short-term receivables 957   1,594    
Repurchase agreements and cash collateral on securities lent $ 193   668    
Term of credit default swaps 5 years 5 years      
Largest single counterparty exposure without master netting agreements or the benefit of collateral held $ 6,700   7,202    
Net amounts excluding financing entity $ 561   $ 429    
Percentage ceded to reinsurers 94.00%   93.00% 94.00% 93.00%
Exposure to credit risk $ 43,193   $ 40,753    
Net exposure after offsetting agreements and benefit of fair value of collateral held $ 16,189   17,595    
+10%          
Disclosure of credit risk exposure [line items]          
Percentage of expected changes in market values of publicly traded equities 10.00% 10.00%      
+20%          
Disclosure of credit risk exposure [line items]          
Percentage of expected changes in market values of publicly traded equities 20.00% 20.00%      
+30%          
Disclosure of credit risk exposure [line items]          
Percentage of expected changes in market values of publicly traded equities 30.00% 30.00%      
Reinsurance contracts held          
Disclosure of credit risk exposure [line items]          
Reinsurance assets $ 59,382   58,349    
Bottom of range          
Disclosure of credit risk exposure [line items]          
Global retention limit   $ 40      
Top of range          
Disclosure of credit risk exposure [line items]          
Global retention limit   $ 45      
Derivatives          
Disclosure of credit risk exposure [line items]          
Largest single counterparty exposure without master netting agreements or the benefit of collateral held 1,386   1,319    
Net amounts excluding financing entity $ 0   $ 0    
AA Credit Grades Or Higher          
Disclosure of credit risk exposure [line items]          
Derivative exposure with counterparties, percentage 29.00% 29.00% 30.00%    
Securities lending          
Disclosure of credit risk exposure [line items]          
Loaned securities included in invested assets $ 1,800   $ 1,021    
Largest single counterparty exposure without master netting agreements or the benefit of collateral held 0   0    
Net amounts excluding financing entity $ 0   0    
0.5% Decrease in Interest Rates          
Disclosure of credit risk exposure [line items]          
Sensitivity of net income attributed to shareholders 0.50% 0.50%      
Sensitivity of our net income attributed to shareholders due to change in interest rate $ 100        
0.5% Increase in Interest Rates          
Disclosure of credit risk exposure [line items]          
Sensitivity of net income attributed to shareholders 0.50% 0.50%      
Sensitivity of our net income attributed to shareholders due to change in interest rate $ 100        
0.5% Parallel Move in Interest Rates on CSM          
Disclosure of credit risk exposure [line items]          
Sensitivity of net income attributed to shareholders 0.50% 0.50%      
0.5% Parallel Move in Corporate Spread          
Disclosure of credit risk exposure [line items]          
Sensitivity of net income attributed to shareholders 0.50% 0.50%      
0.2% Percentage Parallel Move in Swap Spread          
Disclosure of credit risk exposure [line items]          
Sensitivity of net income attributed to shareholders 0.20% 0.20%      
Base case scenario          
Disclosure of credit risk exposure [line items]          
Probability-weighted ECL $ 611   629    
Upside scenario          
Disclosure of credit risk exposure [line items]          
Probability-weighted ECL 522   536    
Downside scenario 1          
Disclosure of credit risk exposure [line items]          
Probability-weighted ECL 1,434   1,590    
Downside scenario 2          
Disclosure of credit risk exposure [line items]          
Probability-weighted ECL 1,798   2,104    
Banks          
Disclosure of credit risk exposure [line items]          
Estimated maximum borrowing capacity       $ 500  
Unsecured revolving credit facility          
Disclosure of credit risk exposure [line items]          
Long-term debt 0   $ 0    
Unsecured revolving credit facility | Canadian Chartered Banks          
Disclosure of credit risk exposure [line items]          
Estimated maximum borrowing capacity $ 500        
Federal Home Loan Bank of Indianapolis          
Disclosure of credit risk exposure [line items]          
Estimated maximum borrowing capacity       3,800 $ 3,800
Long-term debt       $ 500 $ 500