v3.26.3
Lending Activities - Credit quality performance indicators for commercial mortgages (Details)
$ in Millions
Sep. 30, 2026
USD ($)
loan
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
loan
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]            
Total $ 55,199   $ 55,208      
Allowance for credit losses $ 816 $ 783 $ 727 $ 718 $ 719 $ 771
Commercial Mortgages            
Financing Receivable, Credit Quality Indicator [Line Items]            
Number of Loans | loan 568   581      
Total $ 37,768   $ 37,009      
Allowance for credit losses $ 638 $ 629 $ 594 $ 561 $ 586 $ 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 563   576      
Total $ 37,093   $ 36,455      
Percent of Total 98.00%   99.00%      
Commercial Mortgages | 90 days or less delinquent            
Financing Receivable, Credit Quality Indicator [Line Items]            
Number of Loans | loan 1   1      
Total $ 29   $ 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 $ 646   $ 539      
Percent of Total 2.00%   1.00%      
Commercial Mortgages | Apartments            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total $ 13,291   $ 13,689      
Allowance for credit losses 31   28      
Commercial Mortgages | Apartments | In good standing            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total 13,291   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 8,318   8,042      
Allowance for credit losses 387   360      
Commercial Mortgages | Offices | In good standing            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total 7,858   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 460   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 4,097   4,300      
Allowance for credit losses 180   164      
Commercial Mortgages | Retail | In good standing            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total 3,911   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 9,495   8,163      
Allowance for credit losses 9   14      
Commercial Mortgages | Industrial | In good standing            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total 9,495   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 1,759   2,037      
Allowance for credit losses 29   27      
Commercial Mortgages | Hotel | In good standing            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total 1,730   2,037      
Commercial Mortgages | Hotel | 90 days or less delinquent            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total 29   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 808   778      
Allowance for credit losses 2   1      
Commercial Mortgages | Others | In good standing            
Financing Receivable, Credit Quality Indicator [Line Items]            
Total 808   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