Consolidated Statements of Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net trade sales	$ 27	$ 37	$ 77	$ 129
Net sales to related companies	1,711	1,819	5,109	5,164
Total Net Sales	1,738	1,856	5,186	5,293
Cost of sales	1,426	1,655	4,485	4,857
Research and development expenses	4	6	15	19
Selling, general and administrative expenses	2	3	7	9
Equity in earnings of nonconsolidated affiliates	2	23	6	83
Sundry income (expense) - net	54	(12)	42	(39)
Interest income	2	3	8	8
Interest expense and amortization of debt discount	8	8	23	23
Income Before Income Taxes	356	198	712	437
Provision for income taxes	109	34	223	141
Net Income Attributable to Union Carbide Corporation	247	164	489	296
Depreciation	45	51	133	152
Capital Expenditures	$ 34	$ 32	$ 98	$ 79