| Sep. 30, 2024 | Sep. 30, 2025 | Dec. 31, 2024 | |
| € million | € million | € million | |
| Noncurrent assets | |||
| Goodwill | 707 | 697 | 719 |
| Other intangible assets | 486 | 434 | 471 |
| Property, plant and equipment | 5,678 | 5,609 | 5,898 |
| Investments accounted for using the equity method | 237 | 240 | 269 |
| Other financial assets | 110 | 107 | 107 |
| Other receivables | 279 | 189 | 125 |
| Deferred taxes | 275 | 298 | 276 |
| 7,772 | 7,574 | 7,865 | |
| Current assets | |||
| Inventories | 2,726 | 2,608 | 2,851 |
| Trade accounts receivable | 1,954 | 1,723 | 1,749 |
| Other financial assets | 270 | 52 | 48 |
| Other receivables | 515 | 598 | 517 |
| Claims for income tax refunds | 87 | 63 | 92 |
| Cash and cash equivalents | 539 | 604 | 509 |
| 6,091 | 5,648 | 5,766 | |
| Total assets | 13,863 | 13,222 | 13,631 |
| Equity | |||
| Capital stock of Covestro AG | 189 | 189 | 189 |
| Capital reserves of Covestro AG | 3,740 | 3,740 | 3,740 |
| Retained earnings incl. total income | 2,334 | 1,974 | 2,171 |
| Accumulated other comprehensive income | 386 | 187 | 558 |
| Equity attributable to Covestro AG shareholders | 6,649 | 6,090 | 6,658 |
| Equity attributable to noncontrolling interest | 19 | 18 | 21 |
| 6,668 | 6,108 | 6,679 | |
| Noncurrent liabilities | |||
| Provisions for pensions and other post-employment benefits | 374 | 284 | 387 |
| Other provisions | 186 | 315 | 253 |
| Financial liabilities | 2,684 | 2,076 | 2,444 |
| Other financial liabilities | 18 | 11 | 12 |
| Income tax liabilities | 43 | 38 | 49 |
| Other nonfinancial liabilities | 24 | 27 | 27 |
| Deferred taxes | 233 | 197 | 204 |
| 3,562 | 2,948 | 3,376 | |
| Current liabilities | |||
| Other provisions | 329 | 387 | 348 |
| Financial liabilities | 887 | 1,574 | 712 |
| Trade accounts payable | 1,975 | 1,773 | 2,101 |
| Other financial liabilities | 146 | 146 | 133 |
| Income tax liabilities | 68 | 62 | 61 |
| Other nonfinancial liabilities | 228 | 224 | 221 |
| 3,633 | 4,166 | 3,576 | |
| Total equity and liabilities | 13,863 | 13,222 | 13,631 |