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]
Stock Repurchased and Retired During Period, Value				0
Net Income Attributable to Union Carbide Corporation	$ 587				587
Stockholders' Equity, Other					0
Dividends declared					(1,289)
Other comprehensive income (loss)	(198)					(198)
Union Carbide Corporation's Stockholder's Equity, Ending at Dec. 31, 2014		$ 2,809	0	312	3,740	(1,243)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased and Retired During Period, Value				(174)
Net Income Attributable to Union Carbide Corporation	808				808
Stockholders' Equity, Other					13
Dividends declared					(1,170)
Other comprehensive income (loss)	15					15
Union Carbide Corporation's Stockholder's Equity, Ending at Dec. 31, 2015	2,301	2,301	0	138	3,391	(1,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased and Retired During Period, Value				0
Net Income Attributable to Union Carbide Corporation	89				89
Stockholders' Equity, Other					0
Dividends declared					(500)
Other comprehensive income (loss)	(92)					(92)
Union Carbide Corporation's Stockholder's Equity, Ending at Dec. 31, 2016	$ 1,798	$ 1,798	$ 0	$ 138	$ 2,980	$ (1,320)