INCOME TAXES	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES A transaction for the sale of stock between the Corporation and Dow in 2014 created a gain that was initially deferred for tax purposes. This deferred gain became taxable as a result of activities executed in anticipation of the intended separation of DowDuPont into three publicly traded companies. As a result, in the third quarter of 2017, the Corporation increased “Income taxes payable” in the consolidated balance sheets and recorded a charge to “Provision for income taxes” in the consolidated statements of income of $97 million. The total amount of gross unrecognized tax benefits for uncertain tax positions, including positions impacting only the timing of tax benefits, was $1 million at September 30, 2017 and $1 million at December 31, 2016. The amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate was $1 million at September 30, 2017 and $1 million at December 31, 2016. In the second quarter of 2016, an adjustment was made to a reserve for a tax matter regarding a historical change in the legal ownership structure of a former nonconsolidated affiliate. The adjustment arose due to legal proceedings and the Corporation’s ongoing assessment of the unrecognized tax benefits, which resulted in an unfavorable impact of $57 million to “Provision for income taxes” in the consolidated statements of income. Interest and penalties associated with uncertain tax positions are recognized as components of "Provision for income taxes" in the consolidated statements of income which totaled an insignificant amount for the three months ended September 30, 2017 and 2016. In the nine months ended September 30, 2017, the Corporation recognized a benefit of $2 million for interest and penalties (a charge of $82 million in the nine months ended September 30, 2016). The Corporation is included in Dow's consolidated federal income tax group and consolidated tax return. Current and deferred tax expenses are calculated for the Corporation as a stand-alone group and are allocated to the group from the consolidated totals. UCC is currently under examination in a number of tax jurisdictions, including the U.S. federal and various state jurisdictions. Positions challenged by the tax authorities may be settled or appealed by the Corporation. As a result, there is an uncertainty in income taxes recognized in the Corporation’s financial statements in accordance with accounting for income taxes and accounting for uncertainty in income taxes. Net reductions to the Corporation’s global unrecognized tax benefits are not expected to be material within the next twelve months.

INCOME TAXES

A transaction for the sale of stock between the Corporation and Dow in 2014 created a gain that was initially deferred for tax purposes. This deferred gain became taxable as a result of activities executed in anticipation of the intended separation of DowDuPont into three publicly traded companies. As a result, in the third quarter of 2017, the Corporation increased “Income taxes payable” in the consolidated balance sheets and recorded a charge to “Provision for income taxes” in the consolidated statements of income of $97 million.

The total amount of gross unrecognized tax benefits for uncertain tax positions, including positions impacting only the timing of tax benefits, was $1 million at September 30, 2017 and $1 million at December 31, 2016. The amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate was $1 million at September 30, 2017 and $1 million at December 31, 2016.

In the second quarter of 2016, an adjustment was made to a reserve for a tax matter regarding a historical change in the legal ownership structure of a former nonconsolidated affiliate. The adjustment arose due to legal proceedings and the Corporation’s ongoing assessment of the unrecognized tax benefits, which resulted in an unfavorable impact of $57 million to “Provision for income taxes” in the consolidated statements of income.

Interest and penalties associated with uncertain tax positions are recognized as components of "Provision for income taxes" in the consolidated statements of income which totaled an insignificant amount for the three months ended September 30, 2017 and 2016. In the nine months ended September 30, 2017, the Corporation recognized a benefit of $2 million for interest and penalties (a charge of $82 million in the nine months ended September 30, 2016).

The Corporation is included in Dow's consolidated federal income tax group and consolidated tax return. Current and deferred tax expenses are calculated for the Corporation as a stand-alone group and are allocated to the group from the consolidated totals. UCC is currently under examination in a number of tax jurisdictions, including the U.S. federal and various state jurisdictions. Positions challenged by the tax authorities may be settled or appealed by the Corporation. As a result, there is an uncertainty in income taxes recognized in the Corporation’s financial statements in accordance with accounting for income taxes and accounting for uncertainty in income taxes. Net reductions to the Corporation’s global unrecognized tax benefits are not expected to be material within the next twelve months.