v3.26.1
Investments (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Schedule of Investments [Line Items]      
Total Unrealized Losses $ 36,709   $ 33,201
Twelve Months or More, Unrealized Losses 34,754   32,225
Fixed maturity securities purchased with credit deterioration 0   0
Write-down on accrued investment income receivable 1 $ 1  
Loans on non-accrual status, do not have allowance for credit losses 250   442
Commercial mortgage and other loans purchased with credit deterioration 0   0
Loans on non-accrual status recognized in interest income 0 4  
Commercial Mortgage Loans      
Schedule of Investments [Line Items]      
Write-downs of loans by origination year 0 0  
Loans acquired 30 0  
Loans sold 0 0  
Financing Receivable, Modified, Commitment to Lend $ 0   0
Commercial Mortgage Loans | Extended Maturity      
Schedule of Investments [Line Items]      
Financing Receivable, Modified, Weighted Average Term Increase from Modification 1 year    
Residential Mortgage Loans      
Schedule of Investments [Line Items]      
Loans acquired $ 844 0  
Loans sold 4 0  
Agricultural property loans      
Schedule of Investments [Line Items]      
Write-downs of loans by origination year 0 0  
Financing Receivable, Modified, Commitment to Lend 0   0
Corporate securities      
Schedule of Investments [Line Items]      
Twelve Months or More, Unrealized Losses 34,754   32,225
Other income (loss) | Fixed maturities | Trading      
Schedule of Investments [Line Items]      
Unrealized gains (losses) on investments (309) 187  
Other income (loss) | Equity securities      
Schedule of Investments [Line Items]      
Unrealized gains (losses) on investments (328) (229)  
Other income (loss) | Assets supporting experience-rated contractholder liabilities      
Schedule of Investments [Line Items]      
Unrealized gains (losses) on investments $ (150) $ (199)  
California      
Schedule of Investments [Line Items]      
Commercial mortgage loan, concentration percentage 29.00%    
Residential mortgage loan, Concentration Percentage 12.00%    
Texas      
Schedule of Investments [Line Items]      
Commercial mortgage loan, concentration percentage 6.00%    
Florida      
Schedule of Investments [Line Items]      
Commercial mortgage loan, concentration percentage 6.00%    
Residential mortgage loan, Concentration Percentage 12.00%    
Europe      
Schedule of Investments [Line Items]      
Commercial mortgage loan, concentration percentage 6.00%    
New York      
Schedule of Investments [Line Items]      
Residential mortgage loan, Concentration Percentage 9.00%    
Mexico      
Schedule of Investments [Line Items]      
Commercial mortgage loan, concentration percentage 2.00%    
Japan      
Schedule of Investments [Line Items]      
Commercial mortgage loan, concentration percentage 1.00%    
Australia      
Schedule of Investments [Line Items]      
Commercial mortgage loan, concentration percentage 1.00%    
NAIC High or Highest Quality Rating | Fixed maturities      
Schedule of Investments [Line Items]      
Total Unrealized Losses $ 35,694   32,392
NAIC Other Than High or Highest Quality Rating | Fixed maturities      
Schedule of Investments [Line Items]      
Total Unrealized Losses $ 1,015   $ 809