Consolidated Statements of Equity (USD $) In Millions, unless otherwise specified	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]	Noncontrolling Interest [Member]
Union Carbide Corporation's stockholder's equity at Dec. 31, 2012			$ 0	$ 312	$ 4,355	$ (1,345)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	296				296
Dividends declared					(289)
Other comprehensive income	23					23
Union Carbide Corporation's stockholder's equity at Sep. 30, 2013		3,352	0	312	4,362	(1,322)
Total Equity at Sep. 30, 2013	3,354
Noncontrolling interests at Sep. 30, 2013							2
Union Carbide Corporation's stockholder's equity at Dec. 31, 2013	3,709		0	312	4,442	(1,045)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	489				489
Dividends declared					(1,010)
Other comprehensive income	28					28
Union Carbide Corporation's stockholder's equity at Sep. 30, 2014	3,216	3,216	0	312	3,921	(1,017)
Total Equity at Sep. 30, 2014	3,216
Noncontrolling interests at Sep. 30, 2014	$ 0						$ 0