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Marketable and Other Securities
6 Months Ended
Jun. 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 LevelJune 30, 2023December 31, 2022
Cash and cash equivalents
Cash and time deposits$10,542 $8,921 
Available-for-sale debt securities
U.S. government and agencies219 1,012 
Corporate debt23,731 2,778 
Sovereign debt21,404 1,828 
Total available-for-sale debt securities – cash equivalents5,155 5,618 
Money market funds17,377 4,613 
Total cash and cash equivalents(a)$23,074 $19,153 
Marketable debt securities
U.S. government and agencies2$3,910 $4,357 
Corporate debt23,687 5,147 
Mortgage and asset-backed2588 538 
Sovereign debt21,372 2,108 
Total available-for-sale debt securities – marketable securities(b)$9,556 $12,150 
Restricted cash
Cash and cash equivalents $379 $341 
Money market funds13,301 2,455 
Total restricted cash$3,680 $2,796 
Available-for-sale debt securities included above with contractual maturities(c)
Due in one year or less$8,364 
Due between one and five years5,675 
Total available-for-sale debt securities with contractual maturities$14,038 
__________
(a)Includes $1.9 billion and $1.5 billion in Cruise at June 30, 2023 and December 31, 2022.
(b)Includes $215 million and $1.4 billion in Cruise at June 30, 2023 and December 31, 2022.
(c)Excludes mortgage and asset-backed securities of $588 million at June 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 $638 million and $494 million in the three months ended June 30, 2023 and 2022 and $1.0 billion in the six months ended June 30, 2023 and 2022. Net unrealized losses on available-for-sale debt securities were insignificant in the three months ended June 30, 2023 and 2022. Net unrealized gains on available-for-sale debt securities were insignificant in the six months ended June 30, 2023 and net unrealized losses on available-for-sale debt securities were $261 million in the six months ended June 30, 2022. Cumulative unrealized losses on available-for-sale debt securities were $303 million and $344 million at June 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:
June 30, 2023
Cash and cash equivalents$23,074 
Restricted cash included in Other current assets3,212 
Restricted cash included in Other assets468 
Total$26,753