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 $ 56,176 $ 56,564
Mortgage Loans in Process of Foreclosure, Amount 137 143
Residential Mortgage Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year 43  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,154  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,315  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 252  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,604  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 6,945  
Financing Receivable, Revolving 0  
Mortgage Loans, Gross $ 12,313 11,815
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 $ 43  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2,141  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 1,274  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 232  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,532  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 6,715  
Financing Receivable, Revolving 0  
Mortgage Loans, Gross $ 11,937  
Loans Receivable Residential Mortgage Percentage 96.90%  
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 13  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 41  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 20  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 72  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 230  
Financing Receivable, Revolving 0  
Mortgage Loans, Gross $ 376  
Loans Receivable Residential Mortgage Percentage 3.10%  
Agricultural Mortgage Loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Year One, Originated, Current Fiscal Year $ 353  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 990  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 535  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 822  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,827  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 9,118  
Financing Receivable, Revolving 1,334  
Mortgage Loans, Gross $ 14,979 $ 15,203
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 $ 353  
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 949  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 503  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 748  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 1,530  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 8,352  
Financing Receivable, Revolving 1,298  
Mortgage Loans, Gross $ 13,733  
Loans Receivable Agricultural Mortgage Percentage 91.70%  
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 41  
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 32  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 74  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 186  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 712  
Financing Receivable, Revolving 18  
Mortgage Loans, Gross $ 1,063  
Loans Receivable Agricultural Mortgage Percentage 7.10%  
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 0.40%  
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 0  
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 0  
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year 89  
Financing Receivable, Originated, More than Five Years before Current Fiscal Year 22  
Financing Receivable, Revolving 14  
Mortgage Loans, Gross $ 125  
Loans Receivable Agricultural Mortgage Percentage 0.80%