v3.26.3
Investments (Mortgage Loans by Credit Quality Indicator) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 12,344 $ 11,268
Construction Loan $ 30 $ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 100.00% 100.00%
Commercial Real Estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 11,736 $ 10,821
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 95.10% 96.00%
Mortgage Loans By Credit Quality Indicator Range One [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 5,435 $ 5,040
Construction Loan $ 30 $ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 46.30% 46.50%
Mortgage Loans By Credit Quality Indicator Range Two [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 4,002 $ 3,331
Construction Loan $ 0 $ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 34.10% 30.80%
Mortgage Loans By Credit Quality Indicator Range Three [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 1,415 $ 1,457
Construction Loan $ 0 $ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 12.10% 13.50%
Mortgage Loans By Credit Quality Indicator Range Four [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 884 $ 993
Construction Loan $ 0 $ 0
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total 7.50% 9.20%
Debt Service Coverage Ratio Range One [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 10,202 $ 9,652
Debt Service Coverage Ratio Range One [Member] | Mortgage Loans By Credit Quality Indicator Range One [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 5,076 4,799
Debt Service Coverage Ratio Range One [Member] | Mortgage Loans By Credit Quality Indicator Range Two [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 3,494 3,084
Debt Service Coverage Ratio Range One [Member] | Mortgage Loans By Credit Quality Indicator Range Three [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 1,034 1,126
Debt Service Coverage Ratio Range One [Member] | Mortgage Loans By Credit Quality Indicator Range Four [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 598 643
Debt Service Coverage Ratio Range Two [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 1,144 798
Debt Service Coverage Ratio Range Two [Member] | Mortgage Loans By Credit Quality Indicator Range One [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 230 162
Debt Service Coverage Ratio Range Two [Member] | Mortgage Loans By Credit Quality Indicator Range Two [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 410 168
Debt Service Coverage Ratio Range Two [Member] | Mortgage Loans By Credit Quality Indicator Range Three [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 327 232
Debt Service Coverage Ratio Range Two [Member] | Mortgage Loans By Credit Quality Indicator Range Four [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 177 236
Debt Service Coverage Ratio Range Three [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 360 371
Debt Service Coverage Ratio Range Three [Member] | Mortgage Loans By Credit Quality Indicator Range One [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 99 79
Debt Service Coverage Ratio Range Three [Member] | Mortgage Loans By Credit Quality Indicator Range Two [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 98 79
Debt Service Coverage Ratio Range Three [Member] | Mortgage Loans By Credit Quality Indicator Range Three [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss 54 99
Debt Service Coverage Ratio Range Three [Member] | Mortgage Loans By Credit Quality Indicator Range Four [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, before Allowance for Credit Loss $ 109 $ 114