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Fair Value Measurements
3 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements FAIR VALUE MEASUREMENTS
 
The Company’s estimates of fair value for financial assets and financial liabilities are based on the framework established in the fair value accounting guidance.  The framework is based on the inputs used in valuation, gives the highest priority to quoted prices in active markets and requires that observable inputs be used in the valuations when available.  The disclosure of fair value estimates in the fair value accounting guidance hierarchy is based on whether the significant inputs into the valuation are observable.  In determining the level of the hierarchy in which the estimate is disclosed, the highest priority is given to unadjusted quoted prices in active markets and the lowest priority to unobservable inputs that reflect the Company’s significant market assumptions.  The level in the fair value hierarchy within which the fair value measurement is reported is based on the lowest level input that is significant to the measurement in its entirety.  The three levels of the hierarchy are as follows:
 
Level 1 - Unadjusted quoted market prices for identical assets or liabilities in active markets that the Company has the ability to access.
Level 2 - Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; or valuations based on models where the significant inputs are observable (e.g., interest rates, yield curves, prepayment speeds, default rates, loss severities, etc.) or can be corroborated by observable market data.
Level 3 - Valuations based on models where significant inputs are not observable.  The unobservable inputs reflect the Company’s own assumptions about the inputs that market participants would use.
 
Valuation of Investments Reported at Fair Value in Financial Statements
 
The Company utilized a pricing service to estimate fair value measurements for approximately 99% of its fixed maturities at both March 31, 2023 and December 31, 2022.
 
While the vast majority of the Company’s fixed maturities are included in Level 2, the Company holds a number of corporate bonds which are not valued by the pricing service and estimates the fair value of these bonds using either another internal pricing matrix, a present value income approach, or a broker quote (collectively, the other methodologies). The other methodologies include some unobservable inputs that are significant to the valuation.  Due to the limited amount of observable market information available in the estimation of fair value, the Company includes the fair value estimates for bonds that are valued using the other methodologies in Level 3. 

For certain investments in non-public common and preferred equity securities, the fair value estimate is determined either internally or by an external fund manager based on the impact of recent observable transactions on the investment, recent filings, operating results, balance sheet stability, growth and other business and market sector fundamentals. Due to the significant unobservable inputs in these valuations, the Company included the fair value estimate of $193 million and $371 million for these investments at March 31, 2023 and December 31, 2022, respectively, in the amounts disclosed in Level 3.

For more information regarding the valuation of the Company’s fixed maturities, equity securities and other investments, see note 4 of the notes to the consolidated financial statements in the Company’s 2022 Annual Report.
 
Fair Value Hierarchy
 
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.
 
(at March 31, 2023, 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
$6,352 $6,352 $ $ 
Obligations of U.S. states, municipalities and political subdivisions30,033  30,033  
Debt securities issued by foreign governments1,010  1,010  
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities
2,864  2,864  
Corporate and all other bonds32,655 9 32,371 275 
Total fixed maturities72,914 6,361 66,278 275 
Equity securities    
Common stock603 438  165 
Non-redeemable preferred stock46 15 3 28 
Total equity securities649 453 3 193 
Other investments16 15  1 
Total$73,579 $6,829 $66,281 $469 
(at December 31, 2022, 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
$5,438 $5,438 $— $— 
Obligations of U.S. states, municipalities and political subdivisions31,379 — 31,379 — 
Debt securities issued by foreign governments994 — 994 — 
Mortgage-backed securities, collateralized mortgage obligations and pass-through securities
1,991 — 1,991 — 
Corporate and all other bonds31,358 — 31,055 303 
Total fixed maturities71,160 5,438 65,419 303 
Equity securities    
Common stock763 418 — 345 
Non-redeemable preferred stock44 15 26 
Total equity securities807 433 371 
Other investments16 15 — 
Total$71,983 $5,886 $65,422 $675 
Other liabilities$$— $— $
 
There was no significant activity in Level 3 of the hierarchy during the three months ended March 31, 2023.

Financial Instruments Disclosed, But Not Carried, At Fair Value
 
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.
(at March 31, 2023, in millions)Carrying
Value
Fair
Value
Level 1Level 2Level 3
Financial assets     
Short-term securities$3,243 $3,243 $409 $2,782 $52 
Financial liabilities     
Debt$7,192 $6,787 $ $6,787 $ 
Commercial paper100 100  100  
 
(at December 31, 2022, in millions)Carrying
Value
Fair
Value
Level 1Level 2Level 3
Financial assets     
Short-term securities$3,470 $3,470 $871 $2,546 $53 
Financial liabilities     
Debt$7,192 $6,509 $— $6,509 $— 
Commercial paper100 100 — 100 — 

The Company had no material assets or liabilities that were measured at fair value on a non-recurring basis during the three months ended March 31, 2023 or the year ended December 31, 2022.