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Investments - Schedule of Debt Securities Available-for-Sale (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Certificates of deposit, Cost or Amortized Cost | $ 6,886,628 | $ 6,067,438
Total, cost or amortized cost | 2,930,235 | 2,504,901
Gross Unrealized Gains | 90 | 571
Gross Unrealized Losses | (7,482) | (3,468)
Total, estimated fair value | 2,922,843 | 2,502,004
Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total, estimated fair value | 362,690 | 236,515
Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total, estimated fair value | 2,435,661 | 2,255,038
Other Assets, Noncurrent |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total, estimated fair value | 10,511 | 10,451
Funds Receivable |  |
Debt Securities, Available-for-sale [Line Items] |  |
Total, estimated fair value | 113,981 | 0
Government bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Cost or Amortized Cost | 464,399 | 850
Gross Unrealized Gains | 44 | 13
Gross Unrealized Losses | (12) | 0
Available-for-sale debt securities, Total Estimated Fair Value | 464,431 | 863
Government bonds | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Government bonds | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 350,450 | 863
Government bonds | Other Assets, Noncurrent |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Government bonds | Funds Receivable |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 113,981 | 0
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Cost or Amortized Cost | 1,104,688 | 1,156,963
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (16) | 0
Available-for-sale debt securities, Total Estimated Fair Value | 1,104,672 | 1,156,963
Commercial paper | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 265,857 | 163,959
Commercial paper | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 838,815 | 993,004
Commercial paper | Other Assets, Noncurrent |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Commercial paper | Funds Receivable |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Cost or Amortized Cost | 794,433 | 917,718
Gross Unrealized Gains | 36 | 220
Gross Unrealized Losses | (6,073) | (3,147)
Available-for-sale debt securities, Total Estimated Fair Value | 788,396 | 914,791
Corporate debt securities | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 35,914 | 41,439
Corporate debt securities | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 741,971 | 862,901
Corporate debt securities | Other Assets, Noncurrent |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 10,511 | 10,451
Corporate debt securities | Funds Receivable |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Mortgage-backed and asset-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Cost or Amortized Cost | 33,046 | 34,019
Gross Unrealized Gains | 10 | 338
Gross Unrealized Losses | (1,381) | (321)
Available-for-sale debt securities, Total Estimated Fair Value | 31,675 | 34,036
Mortgage-backed and asset-backed securities | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Mortgage-backed and asset-backed securities | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 31,675 | 34,036
Mortgage-backed and asset-backed securities | Other Assets, Noncurrent |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Mortgage-backed and asset-backed securities | Funds Receivable |  |
Debt Securities, Available-for-sale [Line Items] |  |
Available-for-sale debt securities, Total Estimated Fair Value | 0 | 0
Certificates of deposit |  |
Debt Securities, Available-for-sale [Line Items] |  |
Certificates of deposit, Cost or Amortized Cost | 533,669 | 395,351
Certificate of deposit, Total Estimated Fair Value | 533,669 | 395,351
Certificates of deposit | Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Certificate of deposit, Total Estimated Fair Value | 60,919 | 31,117
Certificates of deposit | Marketable Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Certificate of deposit, Total Estimated Fair Value | 472,750 | 364,234
Certificates of deposit | Other Assets, Noncurrent |  |
Debt Securities, Available-for-sale [Line Items] |  |
Certificate of deposit, Total Estimated Fair Value | 0 | 0
Certificates of deposit | Funds Receivable |  |
Debt Securities, Available-for-sale [Line Items] |  |
Certificate of deposit, Total Estimated Fair Value | $ 0 | $ 0

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