ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	9 Months Ended
ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	Sep. 30, 2023
Business Combination and Asset Acquisition [Abstract]
ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS	ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTSWe 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. Acquisitions XinThera In May 2023, we closed an agreement to acquire XinThera, Inc. (“XinThera”), a privately held biotechnology company focused on small molecule drugs to treat cancer and immunologic diseases, for approximately $200 million in cash consideration, net of cash acquired. As a result, XinThera became our wholly-owned subsidiary. We accounted for the transaction as an asset acquisition and recorded a $170 million charge to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Income during the three months ended June 30, 2023. The remaining purchase price relates to various other assets acquired and liabilities assumed. Under the agreement, the former shareholders of XinThera are eligible to receive performance-based development and regulatory milestone payments of up to approximately $760 million. Tmunity In February 2023, we closed an agreement to acquire Tmunity Therapeutics, Inc. (“Tmunity”), a clinical-stage, private biotechnology company focused on next-generation 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 Income 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. Collaborations and Other Arrangements Arcellx In January 2023, we closed an agreement to enter into a global strategic collaboration with Arcellx, Inc. (“Arcellx”) to co-develop and co-commercialize Arcellx’s lead late-stage product candidate, CART-ddBCMA, for the treatment of patients with relapsed or refractory multiple myeloma, and potential future next-generation autologous and non-autologous products. In conjunction with the collaboration agreement, we recorded a $212 million charge to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Income during the three months ended March 31, 2023, primarily related to an upfront payment, as well as a $115 million equity investment, which is subject to lock-up provisions until July 2024 and is in Prepaid and other current assets on our Condensed Consolidated Balance Sheets as of September 30, 2023. The companies will share development, clinical trial and commercialization costs for CART-ddBCMA and will jointly commercialize the product and split U.S. profits 50/50. Outside the U.S., we will commercialize the product and Arcellx will receive royalties on sales. Arcellx is eligible to receive performance-based development and regulatory milestone payments of up to $835 million related to CART-ddBCMA, a potential future next-generation autologous product and a potential future non-autologous product, with further commercial milestone payments, profit split payments on co-promoted products and royalties on at least a portion of worldwide net sales, depending on whether Arcellx opts in to co-promote the future products. If additional future products are developed, Arcellx would be eligible to receive additional milestone payments, profit split payments on co-promoted products and royalties on at least a portion of worldwide net sales, depending on whether Arcellx opts in to co-promote these additional future products as well. Pionyr In June 2020, we entered into a transaction with Pionyr Immunotherapeutics (“Pionyr”), a privately held company pursuing novel biology in the field of immuno-oncology, which included entry into two separate agreements, one related to the initial acquisition of a 49.9% equity interest in Pionyr and the other providing us with the exclusive option, subject to certain terms and conditions, to acquire the remaining outstanding capital stock of Pionyr (“Pionyr Merger and Option Agreements”). The exclusive option had an estimated fair value of $70 million based on a probability-weighted option pricing model using unobservable inputs, which are considered Level 3 under the fair value measurement and disclosure guidance. In March 2023, we waived our exclusive option to acquire Pionyr and certain other rights under the Pionyr Merger and Option Agreements and recorded a $70 million charge to Other income (expense), net on our Condensed Consolidated Statements of Income during the three months ended March 31, 2023. In August 2023, Pionyr was acquired by Ikena Oncology, Inc. (“Ikena”) and our equity interest was converted to shares of Ikena stock. TizonaIn July 2020, we entered into a transaction with Tizona Therapeutics, Inc. (“Tizona”), a privately held company developing cancer immunotherapies, which included entry into two separate agreements, one related to the initial acquisition of a 49.9% equity interest in Tizona and the other providing us the exclusive option, subject to certain terms and conditions, to acquire the remaining outstanding capital stock of Tizona (“Tizona Merger and Option Agreements”). The exclusive option had an estimated fair value of $41 million based on a probability-weighted option pricing model using unobservable inputs, which are considered Level 3 under the fair value measurement and disclosure guidance. In September 2023, we waived our exclusive option to acquire Tizona and certain other rights under the Tizona Merger and Option Agreements and recorded a $41 million charge to Other income (expense), net on our Condensed Consolidated Statements of Income during the three months ended September 30, 2023.