v3.26.1
Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Level within the fair value hierarchy at which the Company's financial assets and financial liabilities are measured on a recurring basis [Table Text Block]
The following tables present the level within the fair value hierarchy at which the Company’s financial assets and financial liabilities are measured on a recurring basis.
(as of June 30, 2026, in millions)TotalLevel 1Level 2Level 3
Invested assets:    
Fixed maturities    
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities
$3,281 $3,281 $ $ 
Obligations of U.S. states, municipalities and political subdivisions33,057  33,057  
Debt securities issued by foreign governments397  397  
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities
12,619  12,619  
Corporate and all other bonds43,568 1 43,497 70 
Total fixed maturities92,922 3,282 89,570 70 
Equity securities    
Common stock619 611  8 
Non-redeemable preferred stock33 8 3 22 
Total equity securities652 619 3 30 
Other investments9 9   
Total$93,583 $3,910 $89,573 $100 
(as of December 31, 2025, in millions)TotalLevel 1Level 2Level 3
Invested assets:    
Fixed maturities    
U.S. Treasury securities and obligations of U.S. government and government agencies and authorities
$3,857 $3,857 $— $— 
Obligations of U.S. states, municipalities and political subdivisions31,378 — 31,378 — 
Debt securities issued by foreign governments312 — 312 — 
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities
13,232 — 13,232 — 
Corporate and all other bonds41,054 25 40,698 331 
Total fixed maturities89,833 3,882 85,620 331 
Equity securities    
Common stock584 576 — 
Non-redeemable preferred stock34 24 
Total equity securities618 583 32 
Other investments— — 
Assets held for sale3,347 104 3,243 — 
Total$93,807 $4,578 $88,866 $363 
Carrying value and fair value of the Company's financial assets and financial liabilities disclosed, but not carried, at fair value, and the level within the fair value hierarchy at which such assets and liabilities are categorized [Table Text Block]
The following tables present the carrying value and fair value of the Company’s financial assets and financial liabilities disclosed, but not carried, at fair value, and the level within the fair value hierarchy at which such assets and liabilities are categorized.
(as of June 30, 2026, in millions)Carrying
Value
Fair
Value
Level 1Level 2Level 3
Financial assets     
Short-term securities$4,579 $4,579 $823 $3,706 $50 
Financial liabilities     
Debt$8,968 $8,214 $ $8,214 $ 
Commercial paper100 100  100  
(as of December 31, 2025, in millions)Carrying
Value
Fair
Value
Level 1Level 2Level 3
Financial assets     
Short-term securities$5,716 $5,716 $1,398 $4,267 $51 
Financial liabilities     
Debt$9,167 $8,538 $— $8,538 $— 
Commercial paper100 100 — 100 —