Planned Merger with DuPont (Notes)	9 Months Ended
Sep. 30, 2016
PLANNED MERGER WITH DUPONT [Abstract]
Proposed Merger with DuPont [Text Block]	PLANNED MERGER WITH DUPONT On December 11, 2015, Dow and E. I. du Pont de Nemours and Company ("DuPont") entered into an Agreement and Plan of Merger ("Merger Agreement") to effect an all-stock, merger of equals strategic combination resulting in a newly formed corporation named DowDuPont Inc. ("DowDuPont"). Pursuant to the terms of the Merger Agreement, Dow and DuPont will each merge with wholly owned subsidiaries of DowDuPont (the "Mergers") and, as a result of the Mergers, will become subsidiaries of DowDuPont. Following the consummation of the Mergers, Dow and DuPont intend to pursue, subject to the receipt of regulatory approvals and approval by the board of directors of DowDuPont, the separation of the combined company’s agriculture business, specialty products business and material science business through one or more tax-efficient transactions. On June 9, 2016, DowDuPont's registration statement filed with the U.S. Securities and Exchange Commission on Form S-4 (File No. 333-209869), as amended, was declared effective. The registration statement was filed in connection with the proposed Mergers and includes a joint proxy statement of Dow and DuPont and a prospectus of DowDuPont. The companies also scheduled special meetings of their respective stockholders to seek adoption of the Merger Agreement and approval of related matters from such stockholders. Each company's common stockholders of record as of the close of business on June 2, 2016, were entitled to vote at the respective meeting. Dow's special meeting of stockholders was held on July 20, 2016, which resulted in a vote for adoption of the Merger Agreement and approval of related matters. Dow and DuPont remain focused on closing the transaction and continue to work constructively with regulatory agencies in all relevant jurisdictions. Given current regulatory agency status, closing would be expected to occur in the first quarter of 2017, subject to satisfaction of customary closing conditions, including receipt of all regulatory approvals.

PLANNED MERGER WITH DUPONT

On December 11, 2015, Dow and E. I. du Pont de Nemours and Company ("DuPont") entered into an Agreement and Plan of Merger ("Merger Agreement") to effect an all-stock, merger of equals strategic combination resulting in a newly formed corporation named DowDuPont Inc. ("DowDuPont"). Pursuant to the terms of the Merger Agreement, Dow and DuPont will each merge with wholly owned subsidiaries of DowDuPont (the "Mergers") and, as a result of the Mergers, will become subsidiaries of DowDuPont. Following the consummation of the Mergers, Dow and DuPont intend to pursue, subject to the receipt of regulatory approvals and approval by the board of directors of DowDuPont, the separation of the combined company’s agriculture business, specialty products business and material science business through one or more tax-efficient transactions.

On June 9, 2016, DowDuPont's registration statement filed with the U.S. Securities and Exchange Commission on Form S-4 (File No. 333-209869), as amended, was declared effective. The registration statement was filed in connection with the proposed Mergers and includes a joint proxy statement of Dow and DuPont and a prospectus of DowDuPont. The companies also scheduled special meetings of their respective stockholders to seek adoption of the Merger Agreement and approval of related matters from such stockholders. Each company's common stockholders of record as of the close of business on June 2, 2016, were entitled to vote at the respective meeting. Dow's special meeting of stockholders was held on July 20, 2016, which resulted in a vote for adoption of the Merger Agreement and approval of related matters.

Dow and DuPont remain focused on closing the transaction and continue to work constructively with regulatory agencies in all relevant jurisdictions. Given current regulatory agency status, closing would be expected to occur in the first quarter of 2017, subject to satisfaction of customary closing conditions, including receipt of all regulatory approvals.