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Investments - Schedule of Investments by Major Security Type (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Short-term investments |  |
Debt securities, amortized cost | $ 2,521 |
Debt Securities, total estimated fair value | 2,511 |
Total short-term investments | 3,197 | $ 2,244
Long-term investments: |  |
Debt securities, amortized cost | 2,521 |
Debt Securities, total estimated fair value | 2,511 |
Short-term investments |  |
Short-term investments |  |
Debt securities, amortized cost | 2,508 | 2,232
Debt securities, gross unrealized gains | 6 | 1
Debt securities, gross unrealized losses | (7) | (10)
Debt Securities, total estimated fair value | 2,507 | 2,223
Time deposits | 690 | 20
Equity investments |  | 1
Amortized Cost | 3,198 | 2,253
Total short-term investments | 3,197 | 2,244
Long-term investments: |  |
Debt securities, amortized cost | 2,508 | 2,232
Debt securities, gross unrealized gains | 6 | 1
Debt securities, gross unrealized losses | (7) | (10)
Debt Securities, total estimated fair value | 2,507 | 2,223
Short-term investments | Certificates of deposit |  |
Short-term investments |  |
Debt securities, amortized cost | 172 | 573
Debt securities, gross unrealized gains | 0 | 0
Debt securities, gross unrealized losses | 0 | 0
Debt Securities, total estimated fair value | 172 | 573
Long-term investments: |  |
Debt securities, amortized cost | 172 | 573
Debt securities, gross unrealized gains | 0 | 0
Debt securities, gross unrealized losses | 0 | 0
Debt Securities, total estimated fair value | 172 | 573
Short-term investments | Government bonds |  |
Short-term investments |  |
Debt securities, amortized cost | 332 | 83
Debt securities, gross unrealized gains | 1 | 0
Debt securities, gross unrealized losses | 0 | 0
Debt Securities, total estimated fair value | 333 | 83
Long-term investments: |  |
Debt securities, amortized cost | 332 | 83
Debt securities, gross unrealized gains | 1 | 0
Debt securities, gross unrealized losses | 0 | 0
Debt Securities, total estimated fair value | 333 | 83
Short-term investments | Commercial paper |  |
Short-term investments |  |
Debt securities, amortized cost | 366 | 574
Debt securities, gross unrealized gains | 0 | 0
Debt securities, gross unrealized losses | 0 | 0
Debt Securities, total estimated fair value | 366 | 574
Long-term investments: |  |
Debt securities, amortized cost | 366 | 574
Debt securities, gross unrealized gains | 0 | 0
Debt securities, gross unrealized losses | 0 | 0
Debt Securities, total estimated fair value | 366 | 574
Short-term investments | Corporate debt securities |  |
Short-term investments |  |
Debt securities, amortized cost | 1,490 | 965
Debt securities, gross unrealized gains | 4 | 1
Debt securities, gross unrealized losses | (3) | (7)
Debt Securities, total estimated fair value | 1,491 | 959
Long-term investments: |  |
Debt securities, amortized cost | 1,490 | 965
Debt securities, gross unrealized gains | 4 | 1
Debt securities, gross unrealized losses | (3) | (7)
Debt Securities, total estimated fair value | 1,491 | 959
Short-term investments | Mortgage-backed and asset-backed securities |  |
Short-term investments |  |
Debt securities, amortized cost | 148 | 37
Debt securities, gross unrealized gains | 1 | 0
Debt securities, gross unrealized losses | (4) | (3)
Debt Securities, total estimated fair value | 145 | 34
Long-term investments: |  |
Debt securities, amortized cost | 148 | 37
Debt securities, gross unrealized gains | 1 | 0
Debt securities, gross unrealized losses | (4) | (3)
Debt Securities, total estimated fair value | 145 | 34
Other Noncurrent Assets | Corporate debt securities |  |
Short-term investments |  |
Debt securities, amortized cost | 13 | 13
Debt securities, gross unrealized gains | 0 | 0
Debt securities, gross unrealized losses | (9) | (9)
Debt Securities, total estimated fair value | 4 | 4
Long-term investments: |  |
Debt securities, amortized cost | 13 | 13
Debt securities, gross unrealized gains | 0 | 0
Debt securities, gross unrealized losses | (9) | (9)
Debt Securities, total estimated fair value | $ 4 | $ 4

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