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Marketable and Other Securities
12 Months Ended
Dec. 31, 2024
Marketable Securities [Abstract]  
Marketable and Other Securities Marketable and Other Securities
The following table summarizes the fair value of cash equivalents and marketable debt securities, which approximates cost:
Fair Value LevelDecember 31, 2024December 31, 2023
Cash and cash equivalents
Cash and time deposits$12,471 $8,977 
Available-for-sale debt securities
U.S. government and agencies226 211 
Corporate debt21,541 1,439 
Sovereign debt2785 734 
Total available-for-sale debt securities – cash equivalents2,351 2,384 
Money market funds15,050 7,491 
Total cash and cash equivalents$19,872 $18,853 
Marketable debt securities
U.S. government and agencies2$3,082 $3,495 
Corporate debt and other23,592 3,529 
Mortgage and asset-backed2591 589 
Total available-for-sale debt securities – marketable securities$7,265 $7,613 
Restricted cash
Cash and cash equivalents $294 $277 
Money market funds12,798 2,787 
Total restricted cash$3,092 $3,064 
Available-for-sale debt securities included above with contractual maturities(a)
Due in one year or less$3,590 
Due between one and five years5,386 
Total available-for-sale debt securities with contractual maturities$8,976 
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(a)    Excludes mortgage and asset-backed securities of $591 million at December 31, 2024 as these securities are not due at a single maturity date.

Proceeds from the sale of available-for-sale debt securities sold prior to maturity were $2.5 billion, $2.1 billion and $1.8 billion in the years ended December 31, 2024, 2023 and 2022. Available-for-sale debt securities had net unrealized gains of $86 million and $196 million in the years ended December 31, 2024 and 2023 and net unrealized losses of $319 million in the year ended December 31, 2022. Cumulative unrealized losses on available-for-sale debt securities were $74 million and $160 million at December 31, 2024 and 2023.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same amounts shown in the consolidated statements of cash flows:
December 31, 2024December 31, 2023
Cash and cash equivalents$19,872 $18,853 
Restricted cash included in Other current assets2,608 2,604 
Restricted cash included in Other assets484 460 
Total$22,964 $21,917