ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Adjustments to pension and other postretirement benefit plans		$ 12	$ 10	$ 24	$ 20
Accumulated Other Comprehensive Income (Loss) [Member]
Union Carbide Corporation's Stockholder's Equity, Beginning				(1,243)	(1,045)
Union Carbide Corporation's Stockholder's Equity, Ending		(1,219)	(1,026)	(1,219)	(1,026)
Accumulated Translation Adjustment [Member]
Union Carbide Corporation's Stockholder's Equity, Beginning				(63)	(78)
Union Carbide Corporation's Stockholder's Equity, Ending		(63)	(79)	(63)	(79)
Accumulated Defined Benefit Plans and Other Post Retirement Adjustment [Member]
Union Carbide Corporation's Stockholder's Equity, Beginning				(1,180)	(967)
Adjustments to pension and other postretirement benefit plans	[1],[2]			24	20
Adjustments to pension and other postretirement benefit plans, tax	[2]			(14)	(12)
Union Carbide Corporation's Stockholder's Equity, Ending		$ (1,156)	$ (947)	(1,156)	(947)
Impact to Sundry income (expense) [Member]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax				$ 0	$ (1)

[1] Included in "Net periodic benefit cost." See Note 8 for additional information.

[2] Tax amounts are included in "Provision for income taxes" in the consolidated statements of income.