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Investments (Tables) | 9 Months Ended
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Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule of Investments by Major Security Type | The following tables summarize the Company’s investments by major security type (in millions):
| December 31, 2022
| Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Total Estimated Fair Value
Short-term investments |  |  |  |
Debt securities: |  |  |  |
Certificates of deposit | $ | 573 |  | $ | — |  | $ | — |  | $ | 573 |
Government bonds | 83 |  | — |  | — |  | 83 |
Commercial paper | 574 |  | — |  | — |  | 574 |
Corporate debt securities | 965 |  | 1 |  | (7) |  | 959 |
Mortgage-backed and asset-backed securities | 37 |  | — |  | (3) |  | 34 |
Total debt securities | 2,232 |  | 1 |  | (10) |  | 2,223 |
Time deposits | 20 |  | — |  | — |  | 20 |
Equity investments (1) | 1 |  | — |  | — |  | 1 |
Total short-term investments | $ | 2,253 |  | $ | 1 |  | $ | (10) |  | $ | 2,244 |
Long-term investments (2) |  |  |  |
Debt securities: |  |  |  |
Corporate debt securities | $ | 13 |  | $ | — |  | $ | (9) |  | $ | 4 |
| September 30, 2023
| Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Total Estimated Fair Value
Short-term investments |  |  |  |
Debt securities: |  |  |  |
Certificates of deposit | $ | 328 |  | $ | — |  | $ | — |  | $ | 328 |
Government bonds | 291 |  | — |  | — |  | 291 |
Commercial paper | 366 |  | — |  | — |  | 366 |
Corporate debt securities | 1,209 |  | 1 |  | (10) |  | 1,200 |
Mortgage-backed and asset-backed securities | 117 |  | — |  | (6) |  | 111 |
Total debt securities | 2,311 |  | 1 |  | (16) |  | 2,296 |
Time deposits | 490 |  | — |  | — |  | 490 |
Equity investments (1) | 1 |  | — |  | — |  | 1 |
Total short-term investments | $ | 2,802 |  | $ | 1 |  | $ | (16) |  | $ | 2,787 |
Long-term investments (2) |  |  |  |
Debt securities: |  |  |  |
Corporate debt securities | $ | 13 |  | $ | — |  | $ | (9) |  | $ | 4 |
(1)Unrealized gain (loss) on equity investments were immaterial for the three and nine months ended September 30, 2022 and 2023. (2)Classified within other assets, noncurrent on the condensed consolidated balance sheets.
Schedule of Contractual Maturities of the Available-for-Sale Debt Securities | The following table summarizes the contractual maturities of the Company’s available-for-sale debt securities (in millions):
| September 30, 2023
| Amortized Cost | Estimated Fair Value
Due within one year | $ | 1,377 |  | $ | 1,376 |
Due in one year to five years | 877 |  | 859 |
Due within five to ten years | 9 |  | 9 |
Due beyond ten years | 61 |  | 56 |
Total | $ | 2,324 |  | $ | 2,300 |

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- Definition Cash And Cash Equivalents, Debt Securities, Available-For-Sale, And Equity Securities + References No definition available. + Details
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