v3.26.1
Investments (Past Due Mortgage Loans by Portfolio Segment) (Details) - Mortgage Loans - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses $ 22,805 $ 22,926
Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 22,543 22,700
30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 21 50
60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 56 31
90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 68 77
180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 117 68
Commercial    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 12,131 12,319
Commercial | Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 11,993 12,212
Commercial | 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 12 47
Commercial | 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 19 0
Commercial | 90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 47 49
Commercial | 180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 60 11
Agricultural    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 4,622 4,631
Agricultural | Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 4,605 4,623
Agricultural | 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 8 0
Agricultural | 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 3 0
Agricultural | 90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 0 0
Agricultural | 180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 6 8
Residential    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 6,052 5,976
Residential | Current    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 5,945 5,865
Residential | 30 to 59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 1 3
Residential | 60 to 89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 34 31
Residential | 90 to 179 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses 21 28
Residential | 180 Days and Greater Past Due    
Financing Receivable, Past Due [Line Items]    
Financing receivable, before allowance for credit losses $ 51 $ 49