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Financial Instruments - Summary of Cash and Available-for-Sale Securities by Significant Investment Category (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 8,429 | $ 10,519
Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 10,907 | 13,426
Unrealized Gains | 1 | 6
Unrealized Losses | (94) | (151)
Estimated Fair Value | 10,814 | 13,281
Cash and cash equivalents | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,478 | 2,907
Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 6,010 | 5,697
Non- Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,326 | 4,677
Cash and cash equivalents | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,478 | 2,907
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 2,478 | 2,907
Cash and cash equivalents | Cash and cash equivalents | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,478 | 2,907
Cash and cash equivalents | Current Marketable Securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Cash and cash equivalents | Non- Current Marketable Securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Certificates of deposit | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 29 | 27
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 29 | 27
Certificates of deposit | Cash and cash equivalents | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Certificates of deposit | Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 29 | 27
Certificates of deposit | Non- Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
U.S. treasury bills | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 588 | 807
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 588 | 807
U.S. treasury bills | Cash and cash equivalents | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
U.S. treasury bills | Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 588 | 807
U.S. treasury bills | Non- Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
U.S. treasury notes | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,593 | 4,407
Unrealized Gains | 0 | 3
Unrealized Losses | (45) | (67)
Estimated Fair Value | 3,548 | 4,343
U.S. treasury notes | Cash and cash equivalents | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
U.S. treasury notes | Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,642 | 2,664
U.S. treasury notes | Non- Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 906 | 1,679
Corporate debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 4,023 | 5,067
Unrealized Gains | 1 | 3
Unrealized Losses | (47) | (81)
Estimated Fair Value | 3,977 | 4,989
Corporate debt securities | Cash and cash equivalents | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Corporate debt securities | Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 2,594 | 2,082
Corporate debt securities | Non- Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 1,383 | 2,907
Government debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 196 | 211
Unrealized Gains | 0 | 0
Unrealized Losses | (2) | (3)
Estimated Fair Value | 194 | 208
Government debt securities | Cash and cash equivalents | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 0 | 0
Government debt securities | Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | 157 | 117
Government debt securities | Non- Current Marketable Securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value | $ 37 | $ 91

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