v3.26.1
Investments (Past Due Mortgage Loans by Portfolio Segment) (Details) - Mortgage Loans - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses $ 22,827 $ 22,955
Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 22,484 22,729
30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 98 50
60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 35 31
90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 58 77
180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 152 68
Commercial    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 11,930 12,323
Commercial | Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 11,804 12,216
Commercial | 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 0 47
Commercial | 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 0 0
Commercial | 90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 19 49
Commercial | 180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 107 11
Agricultural    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 4,686 4,656
Agricultural | Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 4,679 4,648
Agricultural | 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 0 0
Agricultural | 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 0 0
Agricultural | 90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 6 0
Agricultural | 180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 1 8
Residential    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 6,211 5,976
Residential | Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 6,001 5,865
Residential | 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 98 3
Residential | 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 35 31
Residential | 90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 33 28
Residential | 180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses $ 44 $ 49