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Short-term Investments (Components of Investments) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 8,664 | $ 7,228
Unrealized Gains | 0 | 0
Unrealized Losses | (10) | (1)
Fair Value | 8,654 | 7,227
Cash | 4,665 | 3,612
Short-term investments and cash | 13,319 | 10,839
Commercial Paper [Member] | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 3,300 | 4,905
Unrealized Gains | 0 | 0
Unrealized Losses | (6) | (1)
Fair Value | 3,294 | 4,904
Certificates of deposit and time deposits | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 5,313 | 2,024
Unrealized Gains | 0 | 0
Unrealized Losses | (4) | 0
Fair Value | 5,309 | 2,024
U.S. government securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 23 | 28
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Value | 23 | 28
Corporate notes and bonds | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 28 | 271
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Fair Value | 28 | 271
Cash and Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 4,413 | 1,679
Cash | 4,665 | 3,612
Short-term investments and cash | 9,078 | 5,291
Cash and Cash Equivalents | Commercial Paper [Member] | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 583 | 868
Cash and Cash Equivalents | Certificates of deposit and time deposits | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 3,830 | 750
Cash and Cash Equivalents | U.S. government securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 0
Cash and Cash Equivalents | Corporate notes and bonds | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 0 | 61
Short-term Investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 4,241 | 5,548
Cash | 0 | 0
Short-term investments and cash | 4,241 | 5,548
Short-term Investments | Commercial Paper [Member] | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 2,711 | 4,036
Short-term Investments | Certificates of deposit and time deposits | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 1,479 | 1,274
Short-term Investments | U.S. government securities | Level 1 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | 23 | 28
Short-term Investments | Corporate notes and bonds | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Fair Value | $ 28 | $ 210

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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