ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts Payable and Accrued Liabilities [Line Items]
Accounts payable	$ 1,380	$ 1,540
Salaries, wages and other compensation	235	225
Accrued interest	168	129
Accrued taxes, other than income taxes	129	90
Pension, postretirement, postemployment and other employee benefits	111	76
Deferred revenue	91	82
Accrued mining royalties	68	46
Other	139	205
Total accounts payable and accrued liabilities	2,321	2,393
Cash interest paid, net	565	743	$ 570
Cash interest paid, net	$ 565	$ 743	$ 570