Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenue from Contract with Customer, Including Assessed Tax	$ 54	$ 31	$ 157	$ 102
Net sales to related companies	1,284	1,244	4,228	3,502
Net trade sales	1,338	1,275	4,385	3,604
Cost of sales	1,163	1,093	3,687	3,338
Research and development expenses	6	7	20	19
Selling, general and administrative expenses	4	2	8	7
Restructuring and asset related charges - net	0	1	0	1
Sundry income (expense) - net	(12)	(10)	(40)	(43)
Interest Income, Other	6	1	9	2
Interest expense and amortization of debt discount	6	5	20	19
Income before income taxes	153	158	619	179
Provision for income taxes	34	54	144	59
Net Income Attributable to Union Carbide Corporation	$ 119	$ 104	$ 475	$ 120