| 2nd quarter 2024 | 2nd quarter 2025 | 1st half 2024 | 1st half 2025 | |
| € million | € million | € million | € million | |
| Income after income taxes | (74) | (59) | (111) | (220) | 
| Remeasurements of the net defined benefit liability for post-employment benefit plans | 80 | 37 | 125 | 81 | 
| Income taxes | – | (2) | (2) | (4) | 
| Other comprehensive income from remeasurements of the net defined benefit liability for post-employment benefit plans | 80 | 35 | 123 | 77 | 
| Changes in fair values of equity instruments | – | (1) | – | (1) | 
| Income taxes | – | (1) | – | (1) | 
| Other comprehensive income from equity instruments | – | (2) | – | (2) | 
| Other comprehensive income that will not be reclassified subsequently to profit or loss | 80 | 33 | 123 | 75 | 
| Losses from derivative financial instruments (cash flow hedge reserve) | – | (2) | – | (9) | 
| Reclassified to profit or loss | – | (2) | – | (2) | 
| Income taxes | – | 3 | – | 6 | 
| Other comprehensive income from derivative financial instruments | – | (1) | – | (5) | 
| Exchange differences of foreign operations | 24 | (231) | 44 | (359) | 
| Other comprehensive income from exchange differences | 24 | (231) | 44 | (359) | 
| Other comprehensive income that may be reclassified subsequently to profit or loss | 24 | (232) | 44 | (364) | 
| Total other comprehensive income | 104 | (199) | 167 | (289) | 
| attributable to noncontrolling interest | (1) | (1) | (1) | (2) | 
| attributable to Covestro AG shareholders | 105 | (198) | 168 | (287) | 
| Total comprehensive income | 30 | (258) | 56 | (509) | 
| attributable to noncontrolling interest | (3) | (1) | (5) | (3) | 
| attributable to Covestro AG shareholders | 33 | (257) | 61 | (506) |