INCOME TAXES (Geographic Allocation of Income and Provision for Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Provisional income tax (expense) benefit										$ 79	$ 81	$ 2
Transition tax for accumulated foreign earnings, provisional income tax expense (benefit)										85	$ (789)	(874)
Indirect impact on inventory, provisional for income taxes										(38)
Income (loss) from continuing operations before income taxes
Domestic									$ (1,196)	745		(2,226)
Foreign									(51)	3,004		2,463
Income (loss) from continuing operations before income taxes									(1,247)	3,749		237
Current tax expense (benefit)
Federal									(287)	324		(864)
State and local									25	13		4
Foreign									960	901		971
Total current tax expense									698	1,238		111
Deferred tax expense (benefit)
Federal									52	(318)		1,499
State and local									19	(32)		85
Foreign									(299)	(79)		(171)
Provision (Credit) for deferred income tax									(228)	(429)		1,413
Provision for income taxes on continuing operations									470	809		1,524
Income from continuing operations, net of tax	$ (2,310)	$ 347	$ 90	$ 156	$ 491	$ 714	$ 810	$ 925	$ (1,717)	$ 2,940		$ (1,287)
Goodwill [Member]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent									(17.50%)	0.00%		220.80%
Income (loss) from portfolio actions included in Continuing Operations before Income Taxes, Domestic									$ 1,400			$ 1,400
Sadara Chemical Company
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent									(29.50%)	0.00%		0.00%
Income (loss) from portfolio actions included in Continuing Operations before Income Taxes, Domestic									$ 1,800