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Marketable Securities and Equity Investments
 9 Months Ended
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities and Equity Investments Marketable Securities and Equity Investments
A summary of our cash equivalents and marketable securities, which are recorded at fair value (and do not include $3.5 billion and $3.3 billion of cash as of September 30, 2022 and December 31, 2021, respectively), is shown below:
As of September 30, 2022As of December 31, 2021
Amortized Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Amortized Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
(in millions)
Cash equivalents:
Money market funds$3,610.9 $— $— $3,610.9 $3,478.1 $— $— $3,478.1 
Time deposits2,000.0 — — 2,000.0 — — — — 
Commercial paper18.2 — — 18.2 — — — — 
Total cash equivalents
$5,629.1 $— $— $5,629.1 $3,478.1 $— $— $3,478.1 
Marketable securities:
U.S. Treasury securities$131.7 $— $(1.7)$130.0 $86.6 $— $(0.2)$86.4 
Government-sponsored enterprise securities
10.6 — (0.1)10.5 69.0 — — 69.0 
Corporate debt securities
67.8 — (1.0)66.8 91.1 — (0.2)90.9 
Commercial paper
270.4 — (1.3)269.1 252.8 — (0.1)252.7 
Total marketable debt securities
480.5 — (4.1)476.4 499.5 — (0.5)499.0 
Corporate equity securities
104.4 29.2 (10.8)122.8 69.4 167.1 (5.6)230.9 
Total marketable securities
$584.9 $29.2 $(14.9)$599.2 $568.9 $167.1 $(6.1)$729.9 
Available-for-sale debt securities were classified on our condensed consolidated balance sheets at fair value as follows:
As of September 30, 2022As of December 31, 2021
(in millions)
Cash and cash equivalents$3,629.1 $3,478.1 
Marketable securities
476.4 499.0 
Total
$4,105.5 $3,977.1 
Available-for-sale debt securities by contractual maturity were as follows:
As of September 30, 2022As of December 31, 2021
(in millions)
Matures within one year$4,091.4 $3,912.3 
Matures after one year through five years
14.1 64.8 
Total
$4,105.5 $3,977.1 
We have a limited number of available-for-sale debt securities in insignificant loss positions as of September 30, 2022, which we do not intend to sell and have concluded we will not be required to sell before recovery of the amortized costs for the investments at maturity. We did not record any allowances for credit losses to adjust the fair value of available-for-sale debt securities or gross realized gains or losses in the three and nine months ended September 30, 2022 and 2021.
We record changes in the fair value of our investments in corporate equity securities to “Other income (expense), net” in our condensed consolidated statements of operations. During the three and nine months ended September 30, 2022 and 2021, our net unrealized gains (losses) on corporate equity securities held at the conclusion of each period were as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
(in millions)
Net unrealized gains (losses)
$16.7 $46.7 $(143.1)$5.0 
        
As of September 30, 2022, the carrying value of our equity investments without readily determinable fair values, which are recorded in “Other assets” on our condensed consolidated balance sheets, was $98.6 million.