ACCUMULATED OTHER COMPREHENSIVE (LOSS) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended							6 Months Ended				6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 31, 2012 Accumulated Other Comprehensive Income (Loss) [Member]	Jun. 30, 2012 Accumulated Other Comprehensive Income (Loss) [Member]	Dec. 31, 2011 Accumulated Other Comprehensive Income (Loss) [Member]	Jun. 30, 2013 Accumulated Translation Adjustment [Member]	Jun. 30, 2012 Accumulated Translation Adjustment [Member]	Dec. 31, 2012 Accumulated Translation Adjustment [Member]	Dec. 31, 2011 Accumulated Translation Adjustment [Member]	Jun. 30, 2013 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]		Jun. 30, 2012 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]		Dec. 31, 2012 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]	Dec. 31, 2011 Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]
Translation Adjustments	$ 0	$ 1	$ 0	$ (1)						$ 0	$ (1)
Adjustments to pension and other postretirement benefit plans	15	11	29	20										29	[1],[2]	20	[1],[2]
Adjustments to pension and other postretirement benefit plans, tax														18	[2]	12	[2]
Union Carbide Corporation's stockholder's equity	$ 3,314		$ 3,314		$ 3,322	$ (1,316)	$ (1,345)	$ (1,113)	$ (1,132)	$ (56)	$ (53)	$ (56)	$ (52)	$ (1,260)		$ (1,060)		$ (1,289)	$ (1,080)

[1] Included in net periodic pension cost. See Note 9 for additional information.

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