Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Statement of Cash Flows [Abstract]
Net income attributable to Union Carbide Corporation	$ 298	$ 475
Depreciation and amortization	132	150
Provision (credit) for deferred income tax	(1)	8
Net gain on sales of property and investments	1	1
Restructuring and asset related charges - net	14	0
Net periodic pension benefit cost	29	6
Pension contributions	(2)	(2)
Other Noncash Income (Expense)	1	2
Accounts and notes receivable	19	2
Related company receivables	178	297
Inventories	8	(37)
Accounts payable	109	(37)
Related company payables	(10)	(69)
Asbestos-related payments	(63)	(58)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	7	128
Cash provided by operating activities	716	860
Capital expenditures	(203)	(91)
Change in noncurrent receivable from related company	6	(1)
Proceeds from Sales of Business, Affiliate and Productive Assets	2	1
Proceeds from sales of investments	7	0
Cash used for investing activities	(188)	(91)
Dividends paid to parent	(394)	(768)
Changes in short-term notes payable	(2)	0
Repayments of Long-term Debt	132	2
Cash used for financing activities	(528)	(770)
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