Annual report [Section 13 and 15(d), not S-K Item 405]

SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves (Details)

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SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) - Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Extractive Industries [Abstract]      
Sales and transfers of oil and gas produced, net of production costs $ (850) $ (478) $ (600)
Net changes in prices, production costs, and development costs 1,532 (910) (7,181)
Acquisition of oil and gas reserves in place 0 0 0
Extensions and discoveries 518 368 581
Previously estimated development costs incurred during the period 246 211 263
Revisions of previous quantity estimates, less related production costs (21) (21) (278)
Sales of oil and gas reserves in place 0 0 0
Accretion of discount 175 238 828
Net changes in income taxes (209) 16 1,219
Change in production rates and other 266 (60) (728)
Total change in standardized measure of discounted future net cash flows $ 1,656 $ (636) $ (5,896)