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	$ 2,987	$ (1,770)
Net income attributable to Union Carbide Corporation	$ 16			16
Dividends, Common Stock				(40)
Other Comprehensive Income (Loss), Net of Tax	(104)				104
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0	141	2,898	(1,686)
Net income attributable to Union Carbide Corporation	65			65
Dividends, Common Stock				0
Other Comprehensive Income (Loss), Net of Tax	(20)				20
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,438	0	141	2,963	(1,666)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,664	0	141	3,074	(1,551)
Net income attributable to Union Carbide Corporation	356			356
Dividends, Common Stock				(521)
Other Comprehensive Income (Loss), Net of Tax	(38)				38
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		0	141	3,104	(1,534)
Net income attributable to Union Carbide Corporation	101			101
Dividends, Common Stock				(296)
Other Comprehensive Income (Loss), Net of Tax	(21)				21
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,537	$ 0	$ 141	$ 2,909	$ (1,513)