Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net Income Attributable to Union Carbide Corporation	$ 269	$ 459	$ 696
Other Comprehensive (Loss), Net of Tax
Cumulative translation adjustments	3	6	0
Cumulative unrealized losses on investments	0	(1)	0
Pension and other post-retirement plans:
Net loss arising during period (net of tax of $(83), $(31), $(87))	(166)	(61)	(172)
Less: Amortization of prior service cost included in net periodic pension costs (net of tax of $2, $2, $2)	3	3	3
Less: Amortization of net loss included in net periodic pension costs (net of tax of $31, $22, $-)	54	37	2
Net gain on cash flow hedging derivative instruments	0	0	1
Total other comprehensive loss	(106)	(16)	(166)
Comprehensive Income Attributable to Union Carbide Corporation	$ 163	$ 443	$ 530