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Supplemental information on oil and gas producing activities (unaudited) - Discounted net cash flows (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Supplemental information on oil and gas producing activities (unaudited)      
Net change in sales and transfer prices and in production cost (lifting) related to future production $ 41,742,427 $ (123,240,049) $ 158,798,134
Changes in estimated future development costs (15,349,339) (10,624,343) (52,166,780)
Sales and transfer of oil and gas produced net of production costs (59,519,007) (60,970,234) (68,867,970)
Net change due to extensions, discoveries, and improved recovery 3,723,233 6,173,144 9,993,781
Net change due to purchase and sales of minerals in place 1,501,219 0 1,767,856
Net change due to revisions in quantity estimates 8,877,125 967,150 10,807,453
Previously estimated development costs incurred during the period 27,041,713 34,815,000 69,458,458
Accretion of discount 14,934,714 28,676,517 15,360,418
Timing and other 4,828,442 (13,215,214) (11,990,359)
Net change in income taxes (6,549,370) 77,093,694 (84,908,732)
Aggregate change in the standardized measure of discounted future net cash flows for the year $ 21,231,157 $ (60,324,335) $ 48,252,259