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Marketable Securities and Equity Investments (Tables)
 3 Months Ended
Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cash Equivalents and Marketable Securities
A summary of our cash equivalents and marketable securities, which are recorded at fair value (and do not include $3.2 billion and $3.3 billion of cash as of March 31, 2022 and December 31, 2021, respectively), is shown below:
As of March 31, 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$4,378.6 $— $— $4,378.6 $3,478.1 $— $— $3,478.1 
Commercial paper14.2 — — 14.2 — — — — 
Total cash equivalents
$4,392.8 $— $— $4,392.8 $3,478.1 $— $— $3,478.1 
Marketable securities:
U.S. Treasury securities$155.7 $— $(1.4)$154.3 $86.6 $— $(0.2)$86.4 
Government-sponsored enterprise securities
7.1 — (0.1)7.0 69.0 — — 69.0 
Corporate debt securities
77.4 — (0.6)76.8 91.1 — (0.2)90.9 
Commercial paper
245.3 — (0.7)244.6 252.8 — (0.1)252.7 
Total marketable debt securities
485.5 — (2.8)482.7 499.5 — (0.5)499.0 
Corporate equity securities
69.4 92.2 (6.3)155.3 69.4 167.1 (5.6)230.9 
Total marketable securities
$554.9 $92.2 $(9.1)$638.0 $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 March 31, 2022As of December 31, 2021
(in millions)
Cash and cash equivalents$4,392.8 $3,478.1 
Marketable securities
482.7 499.0 
Total
$4,875.5 $3,977.1 
Available-for-sale debt securities by contractual maturity were as follows:
As of March 31, 2022As of December 31, 2021
(in millions)
Matures within one year$4,819.8 $3,912.3 
Matures after one year through five years
55.7 64.8 
Total
$4,875.5 $3,977.1 
Schedule of Company's Net Unrealized Gains (Losses) on Corporate Equity Securities During the three months ended March 31, 2022 and 2021, our net unrealized losses on corporate equity securities held at the conclusion of each period were as follows:
Three Months Ended March 31,
20222021
(in millions)
Net unrealized losses
$(75.6)$(52.3)