Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Statement of Cash Flows [Abstract]
Net income attributable to Union Carbide Corporation	$ 356	$ 16
Depreciation and amortization	101	102
Provision (credit) for deferred income tax	8	25
Net periodic pension benefit cost	4	(2)
Pension contributions	(1)	(548)
Other Noncash Income	(1)	(1)
Accounts and notes receivable	(5)	(6)
Related company receivables	(18)	499
Inventories	(40)	(38)
Accounts payable	48	96
Related company payables	64	(31)
Asbestos-related payments	(39)	(38)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	93	23
Cash provided by operating activities	570	97
Capital expenditures	(50)	(53)
Change in noncurrent receivable from related company	1	(3)
Cash used for investing activities	(49)	(56)
Dividends paid to parent	(521)	(40)
Repayments of Long-term Debt	1	1
Cash used for financing activities	(522)	(41)
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