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Marketable and Other Securities - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Marketable Securities [Abstract]      
Sale proceeds from investments classified as available-for-sale and sold prior to maturity $ 470 $ 380  
Cumulative unrealized losses on available-for-sale debt securities $ 158   $ 160