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VARIABLE INTEREST ENTITIES (Nonconsolidated Variable Interest Entity) (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Dec. 31, 2018
Variable Interest Entity [Line Items]    
Equity Method Investment, Liability, Noncurrent $ (870) $ (495)
Investment in nonconsolidated affiliates 3,321 3,823
Hemlock Semiconductor LLC [Member]    
Variable Interest Entity [Line Items]    
Equity Method Investment, Liability, Noncurrent (658) (495)
Variable Interest Entity, Not Primary Beneficiary [Member] | Hemlock Semiconductor LLC [Member]    
Variable Interest Entity [Line Items]    
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount 0 0
Equity Method Investment, Liability, Noncurrent (658) (495)
Variable Interest Entity, Not Primary Beneficiary [Member] | Silicon Inputs Joint Ventures [Member]    
Variable Interest Entity [Line Items]    
Investment in nonconsolidated affiliates 96 100
Variable Interest Entity, Not Primary Beneficiary [Member] | AFSI [Member]    
Variable Interest Entity [Line Items]    
Investment in nonconsolidated affiliates 45 48
Other $ 8 $ 8