| Cover | 12 Months Ended |
| Dec. 31, 2023 | |
| Document Information [Line Items] | |
| Document Type | DEFA14A |
| Amendment Flag | false |
| Entity Information [Line Items] | |
| Entity Registrant Name | Dow Inc. |
| Entity Central Index Key | 0001751788 |
| Pay vs Performance Disclosure | 12 Months Ended |
| Dec. 31, 2023 | |
| Pay vs Performance Disclosure | |
| Pay vs Performance Disclosure, Table | PAY VERSUS PERFORMANCE The TSR chart beneath the heading “Pay Versus 0 Except as specifically revised conjunction |
| Total Shareholder Return Vs Peer Group |
