v3.26.1
Commitments and Contingent Liabilities (Narrative Excluding Litigation) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Standby Letters of Credit          
Commitments and Contingent Liabilities [Line Items]          
Guarantee on letters of credit $ 1,400   $ 1,400    
Standby Uncommitted Letters Of Credit          
Commitments and Contingent Liabilities [Line Items]          
Guarantee on letters of credit 500   500    
Related Party          
Commitments and Contingent Liabilities [Line Items]          
Prismic Re Unfunded Commitment 300   300    
Commitments | Commercial Mortgage Loans          
Commitments and Contingent Liabilities [Line Items]          
Allowance for credit losses 6   6   $ 5
Change in allowance for credit losses 1 $ 2 1 $ 2  
Purchase Investments          
Commitments and Contingent Liabilities [Line Items]          
Change in allowance for credit losses 0 0 $ 0 0  
Indemnification | Securities Repurchase Transactions          
Commitments and Contingent Liabilities [Line Items]          
Guarantor obligations, liquidation proceeds, percentage     95.00%    
Indemnification | Serviced Mortgage Loans          
Commitments and Contingent Liabilities [Line Items]          
Allowance for credit losses 10   $ 10   11
Change in allowance for credit losses 1 $ 0 1 (1)  
Mortgages subject to loss-sharing arrangements $ 29,051   $ 29,051   $ 28,275
Weighted-average debt service coverage ratio of mortgages subject to loss-sharing arrangements 1.91   1.91   1.93
Weighted-average loan-to-value ratio of mortgages subject to loss-sharing arrangements 64.00%   64.00%   62.00%
Losses related to indemnifications that were settled     $ 0 $ 0  
Indemnification | Securities Lending and Securities Repurchase Transactions          
Commitments and Contingent Liabilities [Line Items]          
Guarantor obligations, liquidation proceeds, percentage     102.00%    
Indemnification | Minimum | Serviced Mortgage Loans          
Commitments and Contingent Liabilities [Line Items]          
Percentage share of losses incurred on certain loans serviced     4.00%    
Indemnification | Maximum | Serviced Mortgage Loans          
Commitments and Contingent Liabilities [Line Items]          
Percentage share of losses incurred on certain loans serviced     20.00%