v3.26.1
Investments (Credit Quality of Mortgage Loans by Portfolio Segment) (Details) - Mortgage Loans - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY $ 1,168 $ 2,061
Financing receivable, originated in FY before latest FY 2,090 1,813
Financing receivable, originated two years before latest FY 1,656 533
Financing receivable, originated three years before latest FY 475 3,778
Financing receivable, originated four years before latest FY 3,659 5,573
Financing receivable, originated five or more years before latest FY 13,779 9,197
Financing receivable, before allowance for credit losses 22,827 22,955
Commercial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 455 730
Financing receivable, originated in FY before latest FY 706 848
Financing receivable, originated two years before latest FY 815 157
Financing receivable, originated three years before latest FY 136 1,932
Financing receivable, originated four years before latest FY 1,886 2,895
Financing receivable, originated five or more years before latest FY 7,932 5,761
Financing receivable, before allowance for credit losses $ 11,930 $ 12,323
Financing receivable, before allowance for credit losses by debt service coverage ratio as a percentage of financing receivable, before allowance for credit losses 100.00% 100.00%
Commercial | Debt Service Coverage Ratio, Greater than 1.20x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, before allowance for credit losses $ 10,471 $ 11,157
Financing receivable, before allowance for credit losses by debt service coverage ratio as a percentage of financing receivable, before allowance for credit losses 87.80% 90.50%
Commercial | Debt Service Coverage Ratio, 1.00x to 1.20x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, before allowance for credit losses $ 839 $ 739
Financing receivable, before allowance for credit losses by debt service coverage ratio as a percentage of financing receivable, before allowance for credit losses 7.00% 6.00%
Commercial | Debt Service Coverage Ratio, Less than 1.00x    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, before allowance for credit losses $ 620 $ 427
Financing receivable, before allowance for credit losses by debt service coverage ratio as a percentage of financing receivable, before allowance for credit losses 5.20% 3.50%
Commercial | Loan-to-Value Ratio, Less than 65%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY $ 157 $ 423
Financing receivable, originated in FY before latest FY 423 668
Financing receivable, originated two years before latest FY 634 157
Financing receivable, originated three years before latest FY 136 483
Financing receivable, originated four years before latest FY 436 1,713
Financing receivable, originated five or more years before latest FY 4,125 2,905
Financing receivable, before allowance for credit losses 5,911 6,349
Commercial | Loan-to-Value Ratio, 65% to 75%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 298 262
Financing receivable, originated in FY before latest FY 238 180
Financing receivable, originated two years before latest FY 181 0
Financing receivable, originated three years before latest FY 0 583
Financing receivable, originated four years before latest FY 583 651
Financing receivable, originated five or more years before latest FY 1,555 717
Financing receivable, before allowance for credit losses 2,855 2,393
Commercial | Loan-to-Value Ratio, 76% to 80%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 0 9
Financing receivable, originated in FY before latest FY 40 0
Financing receivable, originated two years before latest FY 0 0
Financing receivable, originated three years before latest FY 0 205
Financing receivable, originated four years before latest FY 148 287
Financing receivable, originated five or more years before latest FY 556 606
Financing receivable, before allowance for credit losses 744 1,107
Commercial | Loan-to-Value Ratio, Greater than 80%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 0 36
Financing receivable, originated in FY before latest FY 5 0
Financing receivable, originated two years before latest FY 0 0
Financing receivable, originated three years before latest FY 0 661
Financing receivable, originated four years before latest FY 719 244
Financing receivable, originated five or more years before latest FY 1,696 1,533
Financing receivable, before allowance for credit losses 2,420 2,474
Agricultural    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 288 458
Financing receivable, originated in FY before latest FY 371 343
Financing receivable, originated two years before latest FY 331 208
Financing receivable, originated three years before latest FY 196 655
Financing receivable, originated four years before latest FY 645 1,151
Financing receivable, originated five or more years before latest FY 2,855 1,841
Financing receivable, before allowance for credit losses 4,686 4,656
Agricultural | Loan-to-Value Ratio, Less than 65%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 273 415
Financing receivable, originated in FY before latest FY 329 343
Financing receivable, originated two years before latest FY 331 191
Financing receivable, originated three years before latest FY 179 558
Financing receivable, originated four years before latest FY 562 1,048
Financing receivable, originated five or more years before latest FY 2,733 1,820
Financing receivable, before allowance for credit losses 4,407 4,375
Agricultural | Loan-to-Value Ratio, 65% to 75%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 15 43
Financing receivable, originated in FY before latest FY 42 0
Financing receivable, originated two years before latest FY 0 17
Financing receivable, originated three years before latest FY 17 97
Financing receivable, originated four years before latest FY 83 100
Financing receivable, originated five or more years before latest FY 116 18
Financing receivable, before allowance for credit losses 273 275
Agricultural | Loan-to-Value Ratio, 76% to 80%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 0 0
Financing receivable, originated in FY before latest FY 0 0
Financing receivable, originated two years before latest FY 0 0
Financing receivable, originated three years before latest FY 0 0
Financing receivable, originated four years before latest FY 0 0
Financing receivable, originated five or more years before latest FY 3 3
Financing receivable, before allowance for credit losses 3 3
Agricultural | Loan-to-Value Ratio, Greater than 80%    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 0 0
Financing receivable, originated in FY before latest FY 0 0
Financing receivable, originated two years before latest FY 0 0
Financing receivable, originated three years before latest FY 0 0
Financing receivable, originated four years before latest FY 0 3
Financing receivable, originated five or more years before latest FY 3 0
Financing receivable, before allowance for credit losses 3 3
Residential    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 425 873
Financing receivable, originated in FY before latest FY 1,013 622
Financing receivable, originated two years before latest FY 510 168
Financing receivable, originated three years before latest FY 143 1,191
Financing receivable, originated four years before latest FY 1,128 1,527
Financing receivable, originated five or more years before latest FY 2,992 1,595
Financing receivable, before allowance for credit losses 6,211 5,976
Residential | Performing    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 425 873
Financing receivable, originated in FY before latest FY 1,010 622
Financing receivable, originated two years before latest FY 510 168
Financing receivable, originated three years before latest FY 143 1,146
Financing receivable, originated four years before latest FY 1,084 1,505
Financing receivable, originated five or more years before latest FY 2,927 1,554
Financing receivable, before allowance for credit losses 6,099 5,868
Residential | Nonperforming    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, originated in current FY 0 0
Financing receivable, originated in FY before latest FY 3 0
Financing receivable, originated two years before latest FY 0 0
Financing receivable, originated three years before latest FY 0 45
Financing receivable, originated four years before latest FY 44 22
Financing receivable, originated five or more years before latest FY 65 41
Financing receivable, before allowance for credit losses $ 112 $ 108