ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	9 Months Ended
ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	Sep. 30, 2022
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 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. 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. We also have equity investments in third parties focused on the development and commercialization of products and product candidates. Acquisitions MiroBio On September 20, 2022, we acquired all of the outstanding share capital of MiroBio Ltd. (“MiroBio”), a privately-held U.K.-based biotechnology company focused on restoring immune balance with agonists targeting immune inhibitory receptors, for $414 million in cash. As a result, MiroBio became our wholly-owned subsidiary. We accounted for the transaction as an asset acquisition and recorded a $389 million charge to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Income during the three months ended September 30, 2022. The remaining purchase price relates to various other assets acquired and liabilities assumed. MYR In the first quarter of 2021, we completed the acquisition of MYR, a German biotechnology company. MYR focuses on the development and commercialization of therapeutics for the treatment of HDV. The acquisition provided Gilead with Hepcludex, which was conditionally approved by the European Medicines Agency (“EMA”) in July 2020 for the treatment of chronic HDV infection in adults with compensated liver disease. MYR is a wholly-owned subsidiary of Gilead. The aggregate consideration for this acquisition of €1.3 billion (or $1.6 billion) primarily consisted of €1.0 billion (or $1.2 billion) paid upon closing and contingent consideration of up to €300 million, subject to customary adjustments, representing a potential future milestone payment upon FDA approval of Hepcludex. The fair value of this contingent liability, estimated using probability-weighted scenarios for FDA approval, was $341 million as of the acquisition date. The fair value of this contingent liability was $249 million as of September 30, 2022 and recorded in Other long-term obligations in our Condensed Consolidated Balance Sheets. See Note 3. Fair Value Measurements for additional information. The acquisition of MYR was accounted for as a business combination using the acquisition method of accounting. The one-year measurement period was completed in the first quarter of 2022, with adjustments recorded to the fair values of assets acquired and liabilities assumed of $18 million. See Note 7. Goodwill and Intangible Assets for additional information. Collaborations and Other Arrangements Dragonfly In April 2022, we entered into a strategic research collaboration agreement (the “Dragonfly Collaboration Agreement”) with Dragonfly Therapeutics, Inc. (“Dragonfly”) to develop natural killer (“NK”) cell engager-based immunotherapies for oncology and inflammation indications. Under the terms of the Dragonfly Collaboration Agreement, we received an exclusive, worldwide license from Dragonfly for the 5T4-targeting investigational immunotherapy program, DF7001, as well as options, after the completion of certain preclinical activities, to license exclusive, worldwide rights to develop and commercialize additional NK cell engager programs using the Dragonfly Tri-specific NK Engager platform. Upon the closing of the Dragonfly Collaboration Agreement, we made a $300 million upfront payment to Dragonfly, and we made an additional $15 million payment related to a target selection in connection with an August 2022 amendment to the agreement, which were recorded in Acquired in-process research and development expenses on our Condensed Consolidated Statements of Income during the nine months ended September 30, 2022. These payments were classified as Acquisitions, including in-process research and development, net of cash acquired in Investing Activities on our Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2022. In addition, Dragonfly is eligible to receive performance-based development and regulatory milestone payments of up to $630 million related to the DF7001 program with further commercial milestone payments and royalties on worldwide net sales if certain products are successfully developed and approved. If we exercise our options on additional NK cell engager programs, Dragonfly would be eligible to receive opt-in payments and performance-based development, regulatory and commercial milestone payments and royalties on worldwide net sales on these optioned programs as well. ArcusIn 2020, we entered into an option, license and collaboration agreement with Arcus (the “Arcus Collaboration Agreement”), which granted us the right to opt in to all current and future clinical-stage product candidates for up to ten years following the closing of the transaction. In November 2021, we exercised our options to three of the clinical-stage programs and amended the Arcus Collaboration Agreement. The option exercise and amendment transaction closed in December 2021, triggering collaboration opt-in payments of $725 million and waiving a $100 million option continuation payment which would have been due to Arcus in the third quarter of 2022. The collaboration opt-in payments of $725 million were recorded in Accrued and other current liabilities on our Consolidated Balance Sheets as of December 31, 2021 and paid to Arcus in January 2022. Our payments to Arcus were included in Acquisitions, including in-process research and development, net of cash acquired in Investing Activities on our Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2022.