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SEGMENT INFORMATION | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
SEGMENT INFORMATION | SEGMENT INFORMATION We have one operating segment which primarily focuses on the discovery, development and commercialization of innovative medicines in areas of unmet medical need. See Note 2. Revenues for disaggregation of our revenues by major products and by geography. Our Chief Executive Officer, as the chief operating decision-maker (“CODM”), uses Net income (loss) attributable to Gilead as the primary measure to evaluate performance, review budget-to-actual results, allocate resources to the operations of our company on an entity-wide basis and forecast future financial results. Managing and allocating resources on an entity-wide basis enables our CODM to assess the overall level of resources available and how to best deploy these resources across functions and research and development (“R&D”) projects based on unmet medical need, scientific data, probability of technical and regulatory successful development, market potential and other considerations, and, as necessary, reallocate resources among our internal R&D portfolio and external opportunities to best support the long-term growth of our business. Our CODM is regularly provided with entity-wide expense categories similar to those found on our Condensed Consolidated Statements of Operations, as well as the following:
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
(in millions) |  | 2025 |  | 2024 |  | 2025 |  | 2024
Selling and marketing expenses |  | $ | 829 |  |  | $ | 848 |  |  | $ | 2,446 |  |  | $ | 2,396 |
General and administrative expenses |  | 527 |  |  | 584 |  |  | 1,534 |  |  | 1,788 |
Selling, general and administrative expenses |  | $ | 1,357 |  |  | $ | 1,433 |  |  | $ | 3,980 |  |  | $ | 4,184 |
Asset information is not regularly provided to the CODM for assessing performance and allocating resources other than consolidated cash, cash equivalents and marketable debt securities, which can be found on our Condensed Consolidated Balance Sheets.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-21 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name 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