Consolidated Statements of Equity - USD ($) $ in Millions	Total	Union Carbide Corporation's Stockholder's Equity [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss), Net of Tax [Member]
Union Carbide Corporation's Stockholder's Equity, Beginning at Dec. 31, 2013			$ 0	$ 312	$ 4,442	$ (1,045)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	$ 242				242
Dividends declared					(655)
Other comprehensive income	19					19
Union Carbide Corporation's Stockholder's Equity, Ending at Jun. 30, 2014			0	312	4,029	(1,026)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Other					0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 3,315
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,809
Union Carbide Corporation's Stockholder's Equity, Beginning at Dec. 31, 2014			0	312	3,740	(1,243)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	340				340
Dividends declared					(220)
Other comprehensive income	24					24
Union Carbide Corporation's Stockholder's Equity, Ending at Jun. 30, 2015			$ 0	$ 312	3,874	$ (1,219)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity, Other					$ 14
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 2,967	$ 2,967