v3.26.1
Investments (Credit Quality of Agricultural and Residential Mortgage Loans) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Mortgage Loans, Gross $ 84,904 $ 85,751
Mortgage Loans in Process of Foreclosure, Amount 179 186
Residential Mortgage Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 111  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 3,670  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,144  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 775  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 2,206  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 8,614  
Financing Receivable, Revolving 0  
Mortgage Loans, Gross $ 17,520 16,800
Loans Receivable Residential Mortgage Percentage 100.00%  
Residential Mortgage Loans | Performing    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 111  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 3,646  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2,085  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 722  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 2,108  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 8,296  
Financing Receivable, Revolving 0  
Mortgage Loans, Gross $ 16,968  
Loans Receivable Residential Mortgage Percentage 96.80%  
Residential Mortgage Loans | Nonperforming    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 24  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 59  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 53  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 98  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 318  
Financing Receivable, Revolving 0  
Mortgage Loans, Gross $ 552  
Loans Receivable Residential Mortgage Percentage 3.20%  
Agricultural Mortgage Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 428  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,437  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 741  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,248  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 2,585  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 11,468  
Financing Receivable, Revolving 1,448  
Mortgage Loans, Gross $ 19,355 $ 19,551
Loans Receivable Agricultural Mortgage Percentage 100.00%  
Agricultural Mortgage Loans | Less than 65%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 428  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 1,353  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 682  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 1,171  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 2,130  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 10,588  
Financing Receivable, Revolving 1,412  
Mortgage Loans, Gross $ 17,764  
Loans Receivable Agricultural Mortgage Percentage 91.80%  
Agricultural Mortgage Loans | 65% to 75%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 84  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 47  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 77  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 286  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 825  
Financing Receivable, Revolving 18  
Mortgage Loans, Gross $ 1,337  
Loans Receivable Agricultural Mortgage Percentage 6.90%  
Agricultural Mortgage Loans | 76% to 80%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 22  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 32  
Financing Receivable, Revolving 4  
Mortgage Loans, Gross $ 58  
Loans Receivable Agricultural Mortgage Percentage 0.30%  
Agricultural Mortgage Loans | Greater than 80%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 0  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 0  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 12  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 147  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 23  
Financing Receivable, Revolving 14  
Mortgage Loans, Gross $ 196  
Loans Receivable Agricultural Mortgage Percentage 1.00%