ACCUMULATED OTHER COMPREHENSIVE (LOSS) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended							9 Months Ended				9 Months Ended						9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 31, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 31, 2012 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2014 Accumulated Translation Adjustment [Member]	Sep. 30, 2013 Accumulated Translation Adjustment [Member]	Dec. 31, 2013 Accumulated Translation Adjustment [Member]	Dec. 31, 2012 Accumulated Translation Adjustment [Member]	Sep. 30, 2014 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]		Sep. 30, 2013 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]		Dec. 31, 2013 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]	Dec. 31, 2012 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]	Sep. 30, 2014 Impact to Sundry income (expense) [Domain]	Sep. 30, 2013 Impact to Sundry income (expense) [Domain]
Translation adjustments	$ (1)	$ (22)	$ (2)	$ (22)						$ (1)	$ (1)
Reclassification to earnings - Sundry income (expense) - net																				(1)	(21)	[1]
Adjustments to pension and other postretirement benefit plans	10	16	30	45										30	[2],[3]	45	[2],[3]
Adjustments to pension and other postretirement benefit plans, tax														(17)	[2]	(26)	[2]
Union Carbide Corporation's stockholder's equity	$ 3,216		$ 3,216		$ 3,709	$ (1,017)	$ (1,045)	$ (1,322)	$ (1,345)	$ (80)	$ (78)	$ (78)	$ (56)	$ (937)		$ (1,244)		$ (967)	$ (1,289)

[1] Reclassification resulted from the divestiture of Nippon Unicar Company, Limited in the third quarter of 2013.

[2] Tax amounts are included in "Provision for income taxes" in the consolidated statements of income.

[3] Included in "Net periodic benefit cost." See Note 8 for additional information.