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Valuation of debt and equity investments and certain liabilities - Investments at Fair Value (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | $ 2,589 | $ 2,964
Short-term investments | 6,163 | 5,611
Long-Term Investments | 26 | 34
Measured at fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 1,873 | 2,163
Short-term investments | 6,163 | 5,611
Long-Term Investments | 11 | 12
Other measurement basis |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 0 | 0
Short-term investments | 0 | 0
Long-Term Investments | 15 | 22
Money market funds | Measured at fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 515 | 1,068
Short-term investments | 0 | 0
Long-Term Investments | 0 | 0
Corporate obligations | Measured at fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 461 | 349
Short-term investments | 1,199 | 1,605
Long-Term Investments | 0 | 0
U.S. government and agency securities | Measured at fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 747 | 696
Short-term investments | 4,667 | 3,808
Long-Term Investments | 0 | 0
Non-U.S. government and agency securities | Measured at fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 150 | 50
Short-term investments | 297 | 198
Long-Term Investments | 0 | 0
Mutual funds | Measured at fair value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 0 | 0
Short-term investments | 0 | 0
Long-Term Investments | 11 | 12
Equity-method investments | Other measurement basis |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 0 | 0
Short-term investments | 0 | 0
Long-Term Investments | 11 | 17
Nonmarketable investments | Other measurement basis |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 0 | 0
Short-term investments | 0 | 0
Long-Term Investments | 4 | 5
Cash on hand | Other measurement basis |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cash and Cash Equivalents | 716 | 801
Short-term investments | 0 | 0
Long-Term Investments | $ 0 | $ 0

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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