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Investments (Tables)
6 Months Ended
Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Pre-tax Gains and Losses for Marketable Securities
Pre-tax gains and losses for marketable securities are summarized below (in millions):

Three Months Ended June 30, 2023Six Months Ended June 30, 2023
 (in millions)
Loss/(gain) on marketable securities sold during the period$104 $(293)
Unrealized loss/(gain) on equity securities held as of the end of the period90 (300)
Dividend income(5)(14)
Total loss/(gain) on marketable securities$189 $(607)