| Document and Entity Information | Nov. 26, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Fiscal Year Focus | 2024 |
| Document Period End Date | Nov. 26, 2024 |
| Entity File Number | 001-38646 |
| Entity Registrant Name | Dow Inc. |
| Entity Incorporation State Country Code | DE |
| Entity Tax Identification Number | 30-1128146 |
| Entity Address Address Line 1 | 2211 H.H. Dow Way |
| Entity Address City Or Town | Midland |
| Entity Address State Or Province | MI |
| Entity Address Postal Zip Code | 48674 |
| City Area Code | 989 |
| Local Phone Number | 636-1000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 per share |
| Trading Symbol | DOW |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Document Fiscal Period Focus | Q3 |
| Entity Central Index Key | 0001751788 |
