VALUATION AND QUALIFYING ACCOUNTS (Schedule of Valuation and Qualifying Accounts) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable - Allowance for Doubtful Receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 42	$ 59	$ 51
Additions charged to expenses	24	10	23
Additions charged to other accounts	0	4	2
Deductions from reserves	(21)	(31)	(17)
Balance at end of year	45	42	59
Accounts Receivable - Allowance for Doubtful Receivables | Sadara Chemical Company
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Additions charged to expenses	2
Inventory - Obsolescence Reserve
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	23	18	34
Additions charged to expenses	19	7	5
Deductions from reserves	(7)	(2)	(21)
Balance at end of year	35	23	18
Reserves for Other Investments and Noncurrent Receivables
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	460	430	350
Additions charged to expenses	1,758	44	83
Deductions from reserves	(3)	(14)	(3)
Balance at end of year	2,215	460	430
Reserves for Other Investments and Noncurrent Receivables | Sadara Chemical Company
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Additions charged to expenses	1,753
Deferred Tax Assets - Valuation Allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	1,225	1,255	936
Additions charged to expenses	140	152	369
Deductions from reserves	(103)	(182)	(50)
Balance at end of year	$ 1,262	$ 1,225	$ 1,255