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Marketable and Other Securities
9 Months Ended
Sep. 30, 2023
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 LevelSeptember 30, 2023December 31, 2022
Cash and cash equivalents
Cash and time deposits$9,813 $8,921 
Available-for-sale debt securities
U.S. government and agencies22,191 1,012 
Corporate debt25,962 2,778 
Sovereign debt22,876 1,828 
Total available-for-sale debt securities – cash equivalents11,029 5,618 
Money market funds14,382 4,613 
Total cash and cash equivalents(a)$25,224 $19,153 
Marketable debt securities
U.S. government and agencies2$3,767 $4,357 
Corporate debt23,890 5,147 
Mortgage and asset-backed2617 538 
Sovereign debt21,376 2,108 
Total available-for-sale debt securities – marketable securities(b)$9,651 $12,150 
Restricted cash
Cash and cash equivalents $316 $341 
Money market funds13,438 2,455 
Total restricted cash$3,754 $2,796 
Available-for-sale debt securities included above with contractual maturities(c)
Due in one year or less$14,426 
Due between one and five years5,482 
Total available-for-sale debt securities with contractual maturities$19,907 
__________
(a)Includes $1.5 billion in Cruise at September 30, 2023 and December 31, 2022.
(b)Includes $192 million and $1.4 billion in Cruise at September 30, 2023 and December 31, 2022.
(c)Excludes mortgage and asset-backed securities of $617 million at September 30, 2023 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 $454 million and $441 million in the three months ended September 30, 2023 and 2022 and $1.5 billion and $1.4 billion in the nine months ended September 30, 2023 and 2022. Net unrealized gains and losses on available-for-sale debt securities were insignificant in the three months ended September 30, 2023 and 2022. Net unrealized gains on available-for-sale debt securities were insignificant in the nine months ended September 30, 2023 and net unrealized losses on available-for-sale debt securities were $367 million in the nine months ended September 30, 2022. Cumulative unrealized losses on available-for-sale debt securities were $293 million and $344 million at September 30, 2023 and December 31, 2022.

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheets to the total shown in the condensed consolidated statement of cash flows:
September 30, 2023
Cash and cash equivalents$25,224 
Restricted cash included in Other current assets3,279 
Restricted cash included in Other assets475 
Total$28,978