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Fair Values of Financial Instruments
6 Months Ended
Jun. 30, 2011
Fair Values of Financial Instruments [Abstract]  
Fair Values of Financial Instruments
4) Fair Values of Financial Instruments
     Fair values of financial instruments are determined using valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Fair values are generally measured using quoted prices in active markets for identical assets or liabilities or other inputs, such as quoted prices for similar assets or liabilities, that are observable either directly or indirectly. In those instances where observable inputs are not available, fair values are measured using unobservable inputs for the asset or liability. Unobservable inputs reflect the Corporation’s own assumptions about the assumptions that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. Fair value estimates derived from unobservable inputs are affected by the assumptions used, including the discount rates and the estimated amounts and timing of future cash flows. The derived fair value estimates cannot be substantiated by comparison to independent markets and are not necessarily indicative of the amounts that would be realized in a current market exchange. Certain financial instruments, particularly insurance contracts, are excluded from fair value disclosure requirements.
     The methods and assumptions used to estimate the fair values of financial instruments are as follows:
  (i)   The carrying value of short term investments approximates fair value due to the short maturities of these investments.
  (ii)   Fair values for fixed maturities are determined by management, utilizing prices obtained from an independent, nationally recognized pricing service or, in the case of securities for which prices are not provided by a pricing service, from independent brokers. For fixed maturities that have quoted prices in active markets, market quotations are provided. For fixed maturities that do not trade on a daily basis, the pricing service and brokers provide fair value estimates using a variety of inputs including, but not limited to, benchmark yields, reported trades, broker/dealer quotes, issuer spreads, bids, offers, reference data, prepayment rates and measures of volatility. Management reviews on an ongoing basis the reasonableness of the methodologies used by the relevant pricing service and brokers. In addition, management, using the prices received for the securities from the pricing service and brokers, determines the aggregate portfolio price performance and reviews it against applicable indices. If management believes that significant discrepancies exist, it will discuss these with the relevant pricing service or broker to resolve the discrepancies.
 
  (iii)   Fair values of equity securities are based on quoted market prices.
 
  (iv)   Fair values of long term debt issued by Chubb are determined by management, utilizing prices obtained from an independent, nationally recognized pricing service.
     The carrying values and fair values of financial instruments were as follows:
                                 
    June 30, 2011     December 31, 2010  
    Carrying     Fair     Carrying     Fair  
    Value     Value     Value     Value  
    (in millions)  
 
                               
Assets
                               
Invested assets
                               
Short term investments
  $ 1,690     $ 1,690     $ 1,905     $ 1,905  
Fixed maturities
    37,367       37,367       36,519       36,519  
Equity securities
    1,663       1,663       1,550       1,550  
 
                               
Liabilities
                               
Long term debt
    3,975       4,262       3,975       4,318  
     A pricing service provides fair value amounts for approximately 99% of the Corporation’s fixed maturities. The prices obtained from a pricing service and brokers generally are non-binding, but are reflective of current market transactions in the applicable financial instruments.
     At June 30, 2011 and December 31, 2010, the Corporation held an insignificant amount of financial instruments in its investment portfolio for which a lack of market liquidity impacted the determination of fair value.
          The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels as follows:
          Level 1 — Unadjusted quoted prices in active markets for identical assets.
          Level 2 — Other inputs that are observable for the asset, either directly or indirectly.
          Level 3 — Inputs that are unobservable.
          The fair value of fixed maturities and equity securities categorized based upon the lowest level of input that was significant to the fair value measurement was as follows:
                                 
    June 30, 2011  
    Level 1     Level 2     Level 3     Total  
    (in millions)  
 
                               
Fixed maturities
                               
Tax exempt
  $     $ 20,156     $ 8     $ 20,164  
 
                       
Taxable
                               
U.S. Government and government agency and authority obligations
          832             832  
Corporate bonds
          6,666       189       6,855  
Foreign government and government agency obligations
          6,516       6       6,522  
Residential mortgage-backed securities
          1,092       16       1,108  
Commercial mortgage-backed securities
          1,886             1,886  
 
                       
 
          16,992       211       17,203  
 
                       
 
                               
Total fixed maturities
          37,148       219       37,367  
 
                               
Equity securities
    1,655             8       1,663  
 
                       
 
                               
 
  $ 1,655     $ 37,148     $ 227     $ 39,030  
 
                       
                                 
    December 31, 2010  
    Level 1     Level 2     Level 3     Total  
    (in millions)  
 
                               
Fixed maturities
                               
Tax exempt
  $     $ 19,765     $ 9     $ 19,774  
Taxable
                               
U.S. Government and government agency and authority obligations
          829             829  
Corporate bonds
          6,483       165       6,648  
Foreign government and government agency obligations
          6,135       26       6,161  
Residential mortgage-backed securities
          1,329       21       1,350  
Commercial mortgage-backed securities
          1,757             1,757  
 
                       
 
          16,533       212       16,745  
 
                       
 
                               
Total fixed maturities
          36,298       221       36,519  
 
                               
Equity securities
    1,537             13       1,550  
 
                       
 
                               
 
  $ 1,537     $ 36,298     $ 234     $ 38,069