v3.26.1
INVESTMENTS - Available-for-sale Securities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost $ 84,644   $ 82,106
Allowance for Credit Losses 8   0
Gross Unrealized Gains 544   906
Gross Unrealized Losses 6,372   5,850
Fair Value 78,808   77,162
Amortized Cost (Less Allowance for Credit Losses)      
Due in one year or less 2,563    
Due in years two through five 16,555    
Due in years six through ten 17,150    
Due after ten years 19,425    
Subtotal 55,693    
Amortized Cost (Less Allowance for Credit Losses) 84,636    
Fair Value      
Due in one year or less 2,548    
Due in years two through five 16,312    
Due in years six through ten 16,732    
Due after ten years 14,596    
Subtotal 50,188    
Fair Value 78,808   77,162
Proceeds from sales, gross gains (losses) from sales and allowance for credit losses for AFS fixed maturities      
Proceeds from sales 155 $ 1,302  
Gross gains on sales 2 2  
Gross losses on sales (3) (3)  
Net (increase) decrease in Allowance for Credit and Intent to Sell losses (20) (6)  
Fixed Maturities - Credit Loss Impairments      
Balance, beginning of period 54 47  
Previously recognized impairments on securities that matured, paid, prepaid or sold (1) 0  
Recognized impairments on securities impaired to fair value this period 4 0  
Credit losses recognized this period on securities for which credit losses were not previously recognized 12 5  
Additional credit losses this period on securities previously impaired 2 1  
Balance, end of period 71 $ 53  
Corporate      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 49,712   48,193
Allowance for Credit Losses 8   0
Gross Unrealized Gains 401   658
Gross Unrealized Losses 4,395   4,010
Fair Value 45,710   44,841
Fair Value      
Fair Value 45,710   44,841
U.S. government, agencies and authorities      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 5,058   5,040
Allowance for Credit Losses 0   0
Gross Unrealized Gains 1   1
Gross Unrealized Losses 1,359   1,304
Fair Value 3,700   3,737
Fair Value      
Fair Value 3,700   3,737
States and political subdivisions      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 378   378
Allowance for Credit Losses 0   0
Gross Unrealized Gains 2   3
Gross Unrealized Losses 72   71
Fair Value 308   310
Fair Value      
Fair Value 308   310
Foreign governments      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 553   556
Allowance for Credit Losses 0   0
Gross Unrealized Gains 1   3
Gross Unrealized Losses 84   77
Fair Value 470   482
Fair Value      
Fair Value 470   482
Residential mortgage-backed      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 7,673   7,093
Allowance for Credit Losses 0   0
Gross Unrealized Gains 50   85
Gross Unrealized Losses 119   92
Fair Value 7,604   7,086
Amortized Cost (Less Allowance for Credit Losses)      
Without single maturity date 7,673    
Fair Value      
Without single maturity date 7,604    
Fair Value 7,604   7,086
Asset-backed      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 16,336   15,978
Allowance for Credit Losses 0   0
Gross Unrealized Gains 72   126
Gross Unrealized Losses 81   46
Fair Value 16,327   16,058
Amortized Cost (Less Allowance for Credit Losses)      
Without single maturity date 16,336    
Fair Value      
Without single maturity date 16,327    
Fair Value 16,327   16,058
Commercial mortgage-backed      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 4,880   4,814
Allowance for Credit Losses 0   0
Gross Unrealized Gains 14   26
Gross Unrealized Losses 262   250
Fair Value 4,632   4,590
Amortized Cost (Less Allowance for Credit Losses)      
Without single maturity date 4,880    
Fair Value      
Without single maturity date 4,632    
Fair Value 4,632   4,590
Redeemable preferred stock      
Debt Securities, Available-for-sale [Line Items]      
Amortized Cost 54   54
Allowance for Credit Losses 0   0
Gross Unrealized Gains 3   4
Gross Unrealized Losses 0   0
Fair Value 57   58
Amortized Cost (Less Allowance for Credit Losses)      
Without single maturity date 54    
Fair Value      
Without single maturity date 57    
Fair Value $ 57   $ 58