ACQUISITIONS Business Combination, Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Business Acquisition [Line Items]
Goodwill	$ 3,414	$ 3,411
Tangier, Morocco Facility
Business Acquisition [Line Items]
Cash and temporary investments			$ 1
Accounts and notes receivable			7
Inventory			3
Plants, properties and equipment			31
Goodwill			4
Other intangible assets			5
Deferred charges and other assets			5
Total assets acquired			56
Accounts payable and accrued liabilities			5
Long-term debt			11
Other long-term liabilities			2
Total liabilities assumed			18
Net assets acquired			$ 38