Impairment and Other Matters	6 Months Ended
Impairment and Other Matters	Jun. 30, 2026
Impairment or Disposal of Tangible Assets Disclosure [Abstract]
IMPAIRMENT AND OTHER MATTERS	2. IMPAIRMENT AND OTHER MATTERS In March 2025, we approved a plan to idle the processing units and cease refining operations at our Benicia Refinery by the end of April 2026. In addition, we considered strategic alternatives for our remaining operations in California. As a result of these actions, the following impacts were recorded in our Refining segment: •During the first quarter of 2025, we evaluated the Benicia and Wilmington refineries for potential impairment and concluded that their carrying values were not recoverable as of March 31, 2025. Therefore, we recognized a combined asset impairment loss of $1.1 billion. •Included in the recoverability assessments discussed above was the recognition of expected asset retirement obligations of $337 million. During the three and six months ended June 30, 2026, we settled approximately $70 million and $170 million, respectively, of the asset retirement obligation related to our Benicia Refinery. •We shortened the estimated useful life of the Benicia Refinery, and as a result, have depreciated the revised carrying value of the net property, plant, and equipment and other noncurrent assets since April 2025 to the estimated salvage value. Accordingly, we recorded incremental depreciation of approximately $33 million and $133 million in the three and six months ended June 30, 2026, respectively, and approximately $100 million in the three and six months ended June 30, 2025 in depreciation and amortization expense. •We implemented a transition plan for the affected employees of the Benicia Refinery, which includes retention incentive payments and separation benefits. During the third quarter of 2025, we recognized a liability of $50 million for these one-time costs, which was included in operating expenses (excluding depreciation and amortization expense). Substantially all of this amount has been paid to eligible employees as of June 30, 2026. •During the second quarter of 2026, we reduced certain inventory levels related to our California operations that resulted in the liquidation of last-in, first-out (LIFO) inventory layers with historical costs that were lower than current replacement costs. As a result, cost of materials and other includes a benefit of $44 million in the three and six months ended June 30, 2026. Similar reductions in inventory levels occurred during the fourth quarter of 2025, which increased cost of materials and other by $37 million in the year ended December 31, 2025. During the first quarter of 2026, we began idling the processing units through a phased approach and ceased operation of the fuel production units at our Benicia Refinery. In accordance with our plan, full idling of all processing units was completed in April 2026. While we continue to evaluate potential redevelopment options for the future use of the refinery property, we plan to maintain all required operating permits and keep the facilities in a safe, clean, and idled condition. In addition, we expect to continue to fulfill our contractual obligations to customers in the Northern California market through imports or other alternative supply arrangements. Effective in the second quarter of 2026, activities associated with the decommissioning and redevelopment of our Benicia Refinery are reported within other corporate expenses in our segment information, as disclosed in Note 10.