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Investment gains/losses (Tables)
3 Months Ended
Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]  
Summary of investment gains and losses

A summary of investment gains and losses in the first quarter of 2018 and 2017 follows (in millions).

 

     2018      2017  

Equity securities:

     

Investment gains and losses during 2018 on securities sold in 2018

       $   (240)        $  

Unrealized investment gains and losses on securities held at the end of the period

     (7,807)         

Gross realized gains

     —         425  

Gross realized losses

     —         (125
  

 

 

    

 

 

 
     (8,047)        300  
  

 

 

    

 

 

 

Fixed maturity securities:

     

Gross realized gains

     359         11  

Gross realized losses

     (138)        (6

Other

     17         10  
  

 

 

    

 

 

 
     $(7,809)        $ 315