RESTRUCTURING AND ASSET RELATED CHARGES - NET	12 Months Ended
Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Asset Related Charges - Net	RESTRUCTURING AND ASSET RELATED CHARGES - NET 2017 Restructuring and Asset Related Charges In September 2017, the Corporation approved restructuring actions that are aligned with DowDuPont's synergy plans. As a result of these actions, the Corporation recorded a pretax restructuring charge for severance and related benefit costs of $8 million in the third quarter of 2017. In November 2017, the Corporation approved additional restructuring actions in connection with the restructuring program. A pretax restructuring charge for severance and related benefit costs of $2 million was recorded in the fourth quarter of 2017, as well as charges of $62 million for the write-off and write-down of manufacturing and facility assets at multiple UCC sites, including a steam unit in Institute, West Virginia. The impact of these charges was shown as "Restructuring and asset related charges - net" in the consolidated statements of income. At December 31, 2017, severance of $2 million had been paid, leaving a liability of $8 million. In addition to actions taken in 2017, the Corporation recorded pretax charges of $3 million in 2018 for additional restructuring charges for severance and related benefit costs. At December 31, 2018, severance of $9 million had been paid, leaving a liability of $4 million. The impact of this charge was shown as “Restructuring and asset related charges - net” in the consolidated statements of income. These actions are expected to be substantially completed by the end of 2019. 2016 Restructuring On June 27, 2016, the Corporation approved actions to further improve cost effectiveness with additional workforce reductions. As a result of these actions, the Corporation recorded a pretax restructuring charge in the second quarter of 2016 consisting of severance and related benefit costs of $1 million for the separation of approximately 5 positions. In the fourth quarter of 2016, the Corporation recorded an additional charge of $2 million related to the separation of an additional 16 positions, and in the second quarter of 2017, an additional charge of $2 million was recorded to adjust the charge for severance and related benefit costs. The impact of these charges was shown as "Restructuring and asset related charges - net" in the consolidated statements of income. At December 31, 2017, the liability for severance and related benefit costs was zero, substantially completing the 2016 restructuring program. The Corporation expects to incur additional costs in the future related to restructuring activities, as UCC continually looks for ways to enhance the efficiency and cost effectiveness of its operations. Future costs are expected to include demolition costs related to the closed facilities; these will be recognized as incurred. The Corporation also expects to incur additional employee-related costs, including involuntary termination benefits, related to its other optimization activities. These costs cannot be reasonably estimated at this time.

RESTRUCTURING AND ASSET RELATED CHARGES - NET

2017 Restructuring and Asset Related Charges

In September 2017, the Corporation approved restructuring actions that are aligned with DowDuPont's synergy plans. As a result of these actions, the Corporation recorded a pretax restructuring charge for severance and related benefit costs of $8 million in the third quarter of 2017. In November 2017, the Corporation approved additional restructuring actions in connection with the restructuring program. A pretax restructuring charge for severance and related benefit costs of $2 million was recorded in the fourth quarter of 2017, as well as charges of $62 million for the write-off and write-down of manufacturing and facility assets at multiple UCC sites, including a steam unit in Institute, West Virginia. The impact of these charges was shown as "Restructuring and asset related charges - net" in the consolidated statements of income. At December 31, 2017, severance of $2 million had been paid, leaving a liability of $8 million.

In addition to actions taken in 2017, the Corporation recorded pretax charges of $3 million in 2018 for additional restructuring charges for severance and related benefit costs. At December 31, 2018, severance of $9 million had been paid, leaving a liability of $4 million. The impact of this charge was shown as “Restructuring and asset related charges - net” in the consolidated statements of income. These actions are expected to be substantially completed by the end of 2019.

2016 Restructuring

On June 27, 2016, the Corporation approved actions to further improve cost effectiveness with additional workforce reductions. As a result of these actions, the Corporation recorded a pretax restructuring charge in the second quarter of 2016 consisting of severance and related benefit costs of $1 million for the separation of approximately 5 positions. In the fourth quarter of 2016, the Corporation recorded an additional charge of $2 million related to the separation of an additional 16 positions, and in the second quarter of 2017, an additional charge of $2 million was recorded to adjust the charge for severance and related benefit costs. The impact of these charges was shown as "Restructuring and asset related charges - net" in the consolidated statements of income. At December 31, 2017, the liability for severance and related benefit costs was zero, substantially completing the 2016 restructuring program.

The Corporation expects to incur additional costs in the future related to restructuring activities, as UCC continually looks for ways to enhance the efficiency and cost effectiveness of its operations. Future costs are expected to include demolition costs related to the closed facilities; these will be recognized as incurred. The Corporation also expects to incur additional employee-related costs, including involuntary termination benefits, related to its other optimization activities. These costs cannot be reasonably estimated at this time.