Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net Income Attributable to Union Carbide Corporation	$ 247	$ 164	$ 489	$ 296
Other Comprehensive Income (Loss), Net of Tax
Translation adjustments	(1)	(22)	(2)	(22)
Pension and other postretirement benefit plans adjustments	10	16	30	45
Total other comprehensive income (loss)	9	(6)	28	23
Comprehensive Income Attributable to Union Carbide Corporation	$ 256	$ 158	$ 517	$ 319