Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Cash Flows [Abstract]
Net income attributable to Union Carbide Corporation	$ 45	$ 255
Depreciation and amortization	43	51
Provision (credit) for deferred income tax	(4)	8
Net gain on sales of property and investments	1	0
Restructuring and asset related charges - net	14	0
Net periodic pension benefit cost	10	2
Pension contributions	(1)	(1)
Accounts and notes receivable	5	3
Related company receivables	111	4
Inventories	(38)	(3)
Accounts payable	42	(35)
Related company payables	(45)	(86)
Asbestos-related payments	(18)	(11)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	21	58
Cash provided by operating activities	184	245
Capital expenditures	(58)	(21)
Change in noncurrent receivable from related company	1	1
Proceeds from Sales of Business, Affiliate and Productive Assets	1	0
Proceeds from sales of investments	7	0
Cash used for investing activities	(49)	(20)
Dividends paid to parent	(135)	(225)
Changes in short-term notes payable	1	0
Repayments of Long-term Debt	1	1
Cash used for financing activities	(135)	(226)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	0	(1)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning Balance	10	11
Cash and cash equivalents at end of period	$ 10	$ 10