Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Union Carbide Corporation's stockholder's equity	$ 2,301	$ 0	$ 138	$ 3,391	$ (1,228)
Net income attributable to Union Carbide Corporation	599			599
Other comprehensive income	32				32
Dividends declared	(455)			(455)
Other	1			1
Union Carbide Corporation's stockholder's equity	2,478	0	138	3,536	(1,196)
Union Carbide Corporation's stockholder's equity	1,798	0	138	2,980	(1,320)
Net income attributable to Union Carbide Corporation	399			399
Other comprehensive income	40				40
Dividends declared	(531)			(531)
Union Carbide Corporation's stockholder's equity	$ 1,706	$ 0	$ 138	$ 2,848	$ (1,280)