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]	Noncontrolling Interest [Member]
Union Carbide Corporation's Stockholder's Equity, Beginning at Dec. 31, 2012			$ 0	$ 312	$ 4,355	$ (1,345)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased and Retired During Period, Value				0
Net Income Attributable to Union Carbide Corporation	$ 748				748
Stockholders' Equity, Other					0
Dividends declared					(661)
Other comprehensive income (loss)	300					300
Union Carbide Corporation's Stockholder's Equity, Ending at Dec. 31, 2013		$ 3,709	0	312	4,442	(1,045)
Total Equity at Dec. 31, 2013	3,711
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interests							$ 2
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	2,809	0	312	3,740	(1,243)
Total Equity at Dec. 31, 2014	2,809
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interests							0
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)
Total Equity at Dec. 31, 2015	$ 2,301
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling interests							$ 0