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Investments (Tables)
12 Months Ended
Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Pre-tax Gains and Losses for Marketable Securities
Pre-tax gains for marketable securities are summarized below:
Year Ended December 31, 2023
 (in millions)
Gain on marketable securities sold during the period
$593 
Dividend income and other
13 
Total gain on marketable securities$606