ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	3 Months Ended
ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract]
ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS We enter into acquisitions, licensing and strategic collaborations and other similar arrangements with third parties for the research, development and commercialization of certain products and product candidates. The collaborations and other arrangements may involve two or more parties who are active participants in the operating activities of the collaboration and are exposed to significant risks and rewards depending on the commercial success of the activities. The financial terms of these arrangements may include non-refundable upfront payments, expense reimbursements or payments by us for options to acquire certain rights, contingent obligations by us for potential development and regulatory milestone payments and/or sales-based milestone payments, royalty payments, revenue or profit-sharing arrangements, cost-sharing arrangements and equity investments. Acquisitions CymaBay In March 2024, we completed the acquisition of CymaBay Therapeutics, Inc. (“CymaBay”) for total consideration of $3.9 billion, net of cash acquired. Upon closing, CymaBay became our wholly-owned subsidiary. CymaBay’s lead program, seladelpar, is an investigational, oral, selective peroxisome proliferator-activated receptor delta agonist, shown to regulate critical metabolic and liver disease pathways. Based on data evaluating the efficacy and tolerability profile of seladelpar in more than 500 participants across Phase 2 and Phase 3 studies, a new drug application for seladelpar was submitted to FDA in December 2023. We accounted for this transaction as an asset acquisition since the lead asset, seladelpar, represents substantially all of the fair value of the gross assets acquired. During the three months ended March 31, 2024, we recorded a $3.9 billion charge, representing an acquired IPR&D asset with no alternative future use, to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Operations. In connection with this acquisition, we recorded $263 million of assets acquired, primarily consisting of deferred tax assets, and $228 million of liabilities assumed, primarily related to an assumed financing arrangement which would be repaid partially upon a change of control and partially upon an approval-based fixed milestone and future sales-based milestones related to seladelpar (see Note 9. Debt and Credit Facilities). During the three months ended March 31, 2024, we also recorded share-based compensation expense of $133 million related to the cash settlement of unvested CymaBay employee stock awards attributable to post-acquisition services, with $67 million being recorded in Research and development expenses and $67 million in Selling, general and administrative expenses on our Condensed Consolidated Statements of Operations. Tmunity In February 2023, we closed an agreement to acquire Tmunity Therapeutics, Inc. (“Tmunity”), a clinical-stage, private biotechnology company focused on next-generation chimeric antigen receptor (“CAR”) T-therapies and technologies. Under the terms of the agreement, we acquired all outstanding shares of Tmunity other than those already owned by Gilead for approximately $300 million in cash consideration. As a result, Tmunity became our wholly-owned subsidiary. We accounted for the transaction as an asset acquisition and recorded a $244 million charge to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Operations during the three months ended March 31, 2023. The remaining purchase price relates to various other assets acquired and liabilities assumed, consisting primarily of deferred tax assets. Under the agreement, the former shareholders of Tmunity and the University of Pennsylvania are eligible to receive a mix of up to approximately $1.0 billion in potential future payments upon achievement of certain development, regulatory and sales-based milestones, as well as royalty payments on sales, with $25 million of that having been charged to Acquired in-process research and development expenses in 2023 and paid in January 2024. Collaborations and Other Arrangements Arcus In January 2024, we amended our collaboration agreement with Arcus whereby we acquired approximately 15.2 million additional shares of Arcus common stock at a premium for $320 million, increasing our ownership to 30.1 million shares, or 33% of the issued and outstanding voting stock of Arcus immediately following the closing of the transaction. We recorded $233 million for the fair value of the equity investment in Prepaid and other current assets on our Condensed Consolidated Balance Sheets and $87 million for the premium in Other (income) expense, net on our Condensed Consolidated Statements of Operations. We also recorded a charge for the $100 million fourth anniversary option continuation fee under the amended agreement to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Operations, which has been accrued as of March 31, 2024 with payment expected to be made by the third quarter of 2024. At that time, this payment will be included within Net cash used in investing activities on our Condensed Consolidated Statements of Cash Flows. Our number of designees on Arcus’ board of directors was also increased to three.