Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Cash Flows [Abstract]
Net income (loss) attributable to Union Carbide Corporation	$ 255	$ (49)
Depreciation and amortization	51	51
Provision (credit) for deferred income tax	8	(4)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	0	(1)
Net periodic pension benefit cost	2	(1)
Pension contributions	(1)	(547)
Other Noncash Income	0	(1)
Accounts and notes receivable	3	(6)
Related company receivables	4	594
Inventories	(3)	(34)
Accounts payable	(35)	19
Related company payables	(86)	120
Asbestos-related payments	(11)	(18)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	58	(58)
Cash provided by operating activities	245	65
Capital expenditures	(21)	(23)
Change in noncurrent receivable from related company	1	(2)
Cash used for investing activities	(20)	(25)
Dividends paid to parent	(225)	(40)
Repayments of Long-term Debt	1	0
Cash used for financing activities	(226)	(40)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(1)	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning Balance	11	11
Cash and cash equivalents at end of period	$ 10	$ 11