Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 0	$ 141	$ 2,922	$ (1,665)
Net income attributable to Union Carbide Corporation	$ 273			273
Dividends, Common Stock				(187)
Other Comprehensive Income (Loss), Net of Tax	(62)				62
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0	141	2,974	(1,623)
Net income attributable to Union Carbide Corporation	59			59
Dividends, Common Stock				(25)
Other Comprehensive Income (Loss), Net of Tax	(20)				20
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,546	0	141	3,008	(1,603)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,358	0	141	2,987	(1,770)
Net income attributable to Union Carbide Corporation	120			120
Dividends, Common Stock				(118)
Other Comprehensive Income (Loss), Net of Tax	(126)				126
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0	141	2,963	(1,666)
Net income attributable to Union Carbide Corporation	104			104
Dividends, Common Stock				(78)
Other Comprehensive Income (Loss), Net of Tax	(22)				22
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,486	$ 0	$ 141	$ 2,989	$ (1,644)