Consolidated Statements of Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Net trade sales	$ 37	$ 35	$ 129	$ 135
Net sales to related companies	1,819	1,465	5,164	4,514
Total Net Sales	1,856	1,500	5,293	4,649
Cost of sales	1,655	1,448	4,857	4,562
Research and development expenses	6	8	19	27
Selling, general and administrative expenses	3	2	9	7
Restructuring charges	0	0	0	3
Equity in earnings of nonconsolidated affiliates	23	16	83	48
Sundry income (expense) - net	(12)	(20)	(39)	(42)
Interest income	3	3	8	11
Interest expense and amortization of debt discount	8	7	23	22
Income Before Income Taxes	198	34	437	45
Provision for income taxes	34	9	141	12
Net Income Attributable to Union Carbide Corporation	164	25	296	33
Depreciation	51	51	152	166
Capital Expenditures	$ 32	$ 47	$ 79	$ 129