v3.26.1
INVESTMENTS - Narrative (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
Loan
note
issue
Loans
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
note
Loan
issue
Dec. 31, 2024
USD ($)
note
Dec. 31, 2023
USD ($)
loan
Net Investment Income [Line Items]          
Number of positions in unrealized loss position | issue 4,231   3,287    
Debt securities exposure in single issuer greater than stated percentage of total investments 0.50%        
Amortized cost of fixed maturities available-for-sale $ 84,644,000,000   $ 82,106,000,000    
12 months or longer, gross unrealized losses 6,086,000,000   5,761,000,000    
Loaned securities $ 1,300,000,000   1,400,000,000    
Minimum requirement percentage of the fair value of the loaned securities to be held as cash collateral 102.00%        
Cash collateral $ 1,300,000,000   1,400,000,000    
Allowance for credit losses 286,000,000 $ 272,000,000 313,000,000    
Non-accruing Loans $ 95,000,000   48,000,000    
Number of modifications to contracts | note 2        
Separate account equity investment carrying value $ 65,000,000   73,000,000    
Interest credited to policyholders account balances participating group annuity contracts 0 0      
Net investment income (loss) 1,284,000,000 1,248,000,000      
Investment gains (losses), net (29,000,000) (14,000,000)      
Cash          
Net Investment Income [Line Items]          
Cash collateral 299,000,000   408,000,000    
Recurring          
Net Investment Income [Line Items]          
Trading securities, at fair value 1,645,000,000   1,572,000,000    
Commercial, Agricultural And Residential Mortgage Loan          
Net Investment Income [Line Items]          
Accrued investment income receivable 120,000,000   118,000,000    
Accrued interest written off $ 0 0      
Individually Assessed Mortgage Loans          
Net Investment Income [Line Items]          
Number of mortgage loans, foreclosure probable | Loan 0        
Mortgage Loans          
Net Investment Income [Line Items]          
Non-accruing Loans $ 49,000,000   11,000,000    
Fixed maturities          
Net Investment Income [Line Items]          
Accrued investment income receivable 666,000,000   669,000,000    
Accrued interest written off 0 $ 0      
Amortized cost of fixed maturities available-for-sale 84,600,000,000   82,100,000,000    
Fixed maturities | Non-Investment Grade          
Net Investment Income [Line Items]          
Available-for-sale securities, amortized cost basis other than investment grade $ 1,800,000,000   $ 1,800,000,000    
Percentage of available for sale securities 2.10%   2.10%    
Unrealized loss on available for sale securities $ 69,000,000   $ 70,000,000    
Public Corporate          
Net Investment Income [Line Items]          
Exposure in single issuer of total investments $ 413,000,000   $ 402,000,000    
Debt securities exposure in single issuer of total investments, percentage 22.20%   27.40%    
Amortized cost of fixed maturities available-for-sale $ 49,712,000,000   $ 48,193,000,000    
12 months or longer, gross unrealized losses $ 4,195,000,000   3,942,000,000    
Commercial mortgages:          
Net Investment Income [Line Items]          
Number of loans 2       4
Number of loans split into notes | note       2  
Number of notes with original loan terms | note       1  
Amortized cost $ 207,000,000   $ 35,000,000 $ 65,000,000 $ 148,000,000
Percentage of total commercial mortgage loans representing amortized cost 1.10%   0.20% 0.30% 0.80%
Number of troubled debt restructuring extensions | loan         2
Debt instrument, term 2 years        
Financing Receivable, Modifications Contracts Modified During Period, Principal Balance     $ 10,000,000    
Number of extinguishment of modified loans | Loan     2    
Extinguishment of debt, amount     $ 84,000,000    
Commercial mortgages: | Minimum          
Net Investment Income [Line Items]          
Debt instrument, term         17 months
Commercial mortgages: | Maximum          
Net Investment Income [Line Items]          
Debt instrument, term         4 years
Agricultural mortgages:          
Net Investment Income [Line Items]          
Number of loans split into notes | note     3    
Amortized cost     $ 9,000,000    
Percentage of total commercial mortgage loans representing amortized cost     0.30%