Summary of significant accounting policies	9 Months Ended
Summary of significant accounting policies	Sep. 30, 2024
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies Business Amgen Inc. (including its consolidated subsidiaries, referred to as “Amgen,” “the Company,” “we,” “our” or “us”) is a global biotechnology pioneer that discovers, develops, manufactures and delivers innovative human therapeutics. We operate in one business segment: human therapeutics. Basis of presentation The interim unaudited financial information for the three and nine months ended September 30, 2024 and 2023, has been prepared in accordance with GAAP and includes all adjustments (consisting of only normal, recurring adjustments unless otherwise indicated) that Amgen considers necessary for a fair presentation, in all material respects, of its condensed consolidated results of operations for those periods. Interim results are not necessarily indicative of results for the full fiscal year. The condensed consolidated financial statements should be read in conjunction with our consolidated financial statements and the notes thereto contained in our Annual Report on Form 10-K for the year ended December 31, 2023, and with our condensed consolidated financial statements and the notes thereto contained in our Quarterly Reports on Form 10-Q for the periods ended March 31, 2024 and June 30, 2024. Principles of consolidation The condensed consolidated financial statements include the accounts of Amgen as well as its majority-owned subsidiaries. In determining whether we are the primary beneficiary of a variable interest entity, we consider whether we have both the power to direct activities of the entity that most significantly impact the entity’s economic performance and the obligation to absorb losses of or the right to receive benefits from the entity that could potentially be significant to that entity. We do not have any significant interests in any variable interest entities of which we are the primary beneficiary. All material intercompany transactions and balances have been eliminated in consolidation. Certain reclassifications have been made to prior periods in the condensed consolidated financial statements and accompanying notes to conform with the current presentation. Use of estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Actual results may differ from those estimates. Property, plant and equipment, net Property, plant and equipment is recorded at historical cost, net of accumulated depreciation and amortization, of $10.3 billion and $9.8 billion as of September 30, 2024 and December 31, 2023, respectively. Recent accounting pronouncements In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, to improve income tax disclosure requirements by requiring more detailed information on several income tax disclosures, such as enhancing disclosure of income taxes paid and requiring disaggregation of the effective income tax rate reconciliation. The standard is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted, and entities may apply the standard prospectively or may elect retrospective application. We are currently evaluating the impact of adopting this new standard on our related disclosures. In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improving Reportable Segment Disclosures, to improve reportable segment disclosure requirements through enhanced disclosures about significant segment expenses and additional interim segment reporting disclosures, including for companies with a single reportable segment. The standard is effective for public business entities for annual periods beginning after December 15, 2023 and interim periods beginning after December 15, 2024. Early adoption is permitted, and the standard requires retrospective application to all prior periods presented. We expect the adoption of this new standard to result in incremental disclosures to the notes to our financial statements.