v3.26.1
Lending Activities - Credit quality performance indicators for commercial mortgages (Details)
$ in Millions
Mar. 31, 2026
USD ($)
loan
Dec. 31, 2025
USD ($)
loan
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]        
Total $ 55,106 $ 55,208    
Allowance for credit losses $ 753 $ 727 $ 792 $ 771
Commercial Mortgages        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 568 581    
Total $ 36,846 $ 37,009    
Allowance for credit losses $ 597 $ 594 $ 656 $ 626
Percent of Total 100.00% 100.00%    
Percentage of total, allowance for credit losses 2.00% 2.00%    
Commercial Mortgages | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 564 576    
Total $ 36,306 $ 36,455    
Percent of Total 99.00% 99.00%    
Commercial Mortgages | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 0 1    
Total $ 0 $ 15    
Percent of Total 0.00% 0.00%    
Commercial Mortgages | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Number of Loans | loan 4 4    
Total $ 540 $ 539    
Percent of Total 1.00% 1.00%    
Commercial Mortgages | Apartments        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total $ 13,894 $ 13,689    
Allowance for credit losses 26 28    
Commercial Mortgages | Apartments | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 13,894 13,688    
Commercial Mortgages | Apartments | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Apartments | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 1    
Commercial Mortgages | Offices        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 7,832 8,042    
Allowance for credit losses 355 360    
Commercial Mortgages | Offices | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 7,478 7,675    
Commercial Mortgages | Offices | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 15    
Commercial Mortgages | Offices | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 354 352    
Commercial Mortgages | Offices | >90 days delinquent or in process of foreclosure | Fortitude RE Funds Withheld Assets        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 13      
Commercial Mortgages | Retail        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 4,102 4,300    
Allowance for credit losses 181 164    
Commercial Mortgages | Retail | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 3,916 4,114    
Commercial Mortgages | Retail | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Retail | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 186 186    
Commercial Mortgages | Retail | >90 days delinquent or in process of foreclosure | Fortitude RE Funds Withheld Assets        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 21      
Commercial Mortgages | Industrial        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 8,320 8,163    
Allowance for credit losses 8 14    
Commercial Mortgages | Industrial | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 8,320 8,163    
Commercial Mortgages | Industrial | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Industrial | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Hotel        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 1,921 2,037    
Allowance for credit losses 25 27    
Commercial Mortgages | Hotel | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 1,921 2,037    
Commercial Mortgages | Hotel | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Hotel | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Others        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 777 778    
Allowance for credit losses 2 1    
Commercial Mortgages | Others | In good standing        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 777 778    
Commercial Mortgages | Others | 90 days or less delinquent        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total 0 0    
Commercial Mortgages | Others | >90 days delinquent or in process of foreclosure        
Financing Receivable, Credit Quality Indicator [Line Items]        
Total $ 0 $ 0