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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) | 9 Months Ended
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Sep. 30, 2023
Accounting Policies [Abstract] |
Basis of Presentation | The accompanying Condensed Consolidated Financial Statements and related Notes to Condensed Consolidated Financial Statements of Gilead Sciences, Inc. (“Gilead,” “we,” “our” or “us”) should be read in conjunction with the audited Consolidated Financial Statements and the related notes thereto for the year ended December 31, 2022, included in our Annual Report on Form 10-K filed with U.S. Securities and Exchange Commission. There have been no material changes to our organization or summary of significant accounting policies as disclosed in that filing. Beginning in the first quarter of 2023, we reclassified changes in income taxes prepaid and receivable from Prepaid expenses and other to combine them with changes in income taxes payable as Income tax assets and liabilities, net within Operating Activities on our Condensed Consolidated Statements of Cash Flows. We believe this presentation assists users of the financial statements to better understand cash flow movements. Prior periods have been revised to reflect this change, resulting in a reclassification of $81 million from Prepaid expenses and other for the nine months ended September 30, 2022.These interim financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and include all adjustments consisting of normal recurring adjustments that the management of Gilead believes are necessary for a fair presentation of the periods presented and are not necessarily indicative of results expected for the full fiscal year or for any subsequent interim period. Certain amounts and percentages in these Condensed Consolidated Financial Statements and accompanying notes may not sum or recalculate due to rounding.
Fair Value Measurements | Level 2 Inputs Available-for-Sale Debt Securities For our available-for-sale debt securities, we estimate the fair values by reviewing trading activity and pricing as of the measurement date, and by taking into consideration valuations obtained from third-party pricing services. The pricing services utilize industry standard valuation models, including both income-based and market-based approaches, for which all significant inputs are observable, either directly or indirectly, to estimate the fair value. These inputs include reported trades and broker/dealer quotes on the same or similar securities, issuer credit spreads, benchmark securities, prepayment/default projections based on historical data and other observable inputs. Foreign Currency Derivative Contracts Our foreign currency derivative contracts have maturities of 18 months or less and all are with counterparties that have a minimum credit rating of A- or equivalent by S&P Global Ratings, Moody’s Investors Service, Inc. or Fitch Ratings, Inc. We estimate the fair values of these contracts by utilizing an income-based industry standard valuation model for which all significant inputs are observable, either directly or indirectly. These inputs include foreign currency exchange rates, Secured Overnight Financing Rate and swap rates. These inputs, where applicable, are observable at commonly quoted intervals. Level 3 Inputs Contingent Consideration Liability In connection with our first quarter 2021 acquisition of MYR, we are subject to a potential contingent consideration payment of up to €300 million, subject to customary adjustments, which is revalued each reporting period using probability-weighted scenarios for U.S. Food and Drug Administration (“FDA”) approval of Hepcludex until the related contingency is resolved.

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- Definition Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). + References No definition available. + Details
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- Definition Disclosure of accounting policy for fair value measurements of financial and non-financial assets, liabilities and instruments classified in shareholders' equity. Disclosures include, but are not limited to, how an entity that manages a group of financial assets and liabilities on the basis of its net exposure measures the fair value of those assets and liabilities. + References No definition available. + Details
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