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Valuation of debt and equity investments and certain liabilities (Tables) | 3 Months Ended
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Mar. 31, 2025
Fair Value Disclosures [Abstract] |
Schedule of Investments | Details of our investments are as follows:
| March 31, 2025 |  | December 31, 2024
| Cash and Cash Equivalents |  | Short-Term Investments |  | Long-Term Investments |  | Cash and Cash Equivalents |  | Short-Term Investments |  | Long-Term Investments
Measured at fair value: |  |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 557 |  |  | $ | — |  |  | $ | — |  |  | $ | 762 |  |  | $ | — |  |  | $ | — |
Corporate obligations | 633 |  |  | 494 |  |  | — |  |  | 694 |  |  | 796 |  |  | — |
U.S. government and agency securities | 1,095 |  |  | 1,649 |  |  | — |  |  | 752 |  |  | 3,485 |  |  | — |
Non-U.S. government and agency securities | 99 |  |  | 99 |  |  | — |  |  | 249 |  |  | 99 |  |  | — |
Mutual funds | — |  |  | — |  |  | 10 |  |  | — |  |  | — |  |  | 11 |
Total | 2,384 |  |  | 2,242 |  |  | 10 |  |  | 2,457 |  |  | 4,380 |  |  | 11 |
Other measurement basis: |  |  |  |  |  |  |  |  |  |  |
Equity-method investments | — |  |  | — |  |  | 6 |  |  | — |  |  | — |  |  | 8 |
Nonmarketable investments | — |  |  | — |  |  | 4 |  |  | — |  |  | — |  |  | 4 |
Total | — |  |  | — |  |  | 10 |  |  | — |  |  | — |  |  | 12 |
Cash on hand | 379 |  |  | — |  |  | — |  |  | 743 |  |  | — |  |  | — |
Total | $ | 2,763 |  |  | $ | 2,242 |  |  | $ | 20 |  |  | $ | 3,200 |  |  | $ | 4,380 |  |  | $ | 23 |
Schedule of Aggregate Maturities of Available-for-sale Debt Investments | The following table presents the aggregate maturities of our debt investments as of March 31, 2025:
|  |  |  |  |  | Fair Value
One year or less |  |  |  |  |  | $ | 3,520 |
One to two years |  |  |  |  |  | 549 |
Schedule of Assets and Liabilities Accounted for at Fair Value | The following are our assets and liabilities that were accounted for at fair value on a recurring basis. These tables do not include cash on hand, assets held by our postretirement plans, or assets and liabilities that are measured at historical cost or any basis other than fair value.
| March 31, 2025 |  | December 31, 2024
| Level 1 |  | Level 2 |  | Total |  | Level 1 |  | Level 2 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 557 |  |  | $ | — |  |  | $ | 557 |  |  | $ | 762 |  |  | $ | — |  |  | $ | 762 |
Corporate obligations | — |  |  | 1,127 |  |  | 1,127 |  |  | — |  |  | 1,490 |  |  | 1,490 |
U.S. government and agency securities | 1,697 |  |  | 1,047 |  |  | 2,744 |  |  | 2,591 |  |  | 1,646 |  |  | 4,237 |
Non-U.S. government and agency securities | — |  |  | 198 |  |  | 198 |  |  | — |  |  | 348 |  |  | 348 |
Mutual funds | 10 |  |  | — |  |  | 10 |  |  | 11 |  |  | — |  |  | 11 |
Total assets | $ | 2,264 |  |  | $ | 2,372 |  |  | $ | 4,636 |  |  | $ | 3,364 |  |  | $ | 3,484 |  |  | $ | 6,848 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Deferred compensation | $ | 402 |  |  | $ | — |  |  | $ | 402 |  |  | $ | 443 |  |  | $ | — |  |  | $ | 443 |
Total liabilities | $ | 402 |  |  | $ | — |  |  | $ | 402 |  |  | $ | 443 |  |  | $ | — |  |  | $ | 443 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + 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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