Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net Income Attributable to Union Carbide Corporation	$ 164	$ 25	$ 296	$ 33
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Translation Adjustments	(22)	2	(22)	1
Pension and other postretirement benefit plans adjustments	16	10	45	30
Total other comprehensive income	(6)	12	23	31
Comprehensive Income Attributable to Union Carbide Corporation	$ 158	$ 37	$ 319	$ 64