VARIABLE INTEREST ENTITIES (Schedule of Consolidated Variable Interest Entities, Carrying Amounts of Assets and Liabilities) (Details) - Variable Interest Entity, Primary Beneficiary [Member] - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Pledged	$ 1,078	$ 1,195
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	507	593
Cash and cash equivalents
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Current, Pledged	116	107
Other current assets
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Current, Pledged	129	131
Net property
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Noncurrent, Pledged	786	907
Other noncurrent assets
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Noncurrent, Pledged	47	50
Current liabilities
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Liabilities, Current	325	303
Current liabilities | Variable Interest Entities Used to Monetize Accounts Receivable [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Liabilities, Current	1	1
Variable Interest Entity, Consolidated, Liabilities, Current, No Recourse	0	0
Long-term debt
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Liabilities, Noncurrent	147	249
Other noncurrent obligations
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Liabilities, Noncurrent	35	41
Current Assets [Member] | Variable Interest Entities Used to Monetize Accounts Receivable [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Assets, Current	7	671
Variable Interest Entity, Consolidated, Assets, Current, Pledged	$ 0	$ 0