COMMITMENTS AND GUARANTEES (Mining Contracts) (Details) T in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) extension T $ / lb	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Surety Bond
Contractual Obligations Mining Contracts [Line Items]
Assurance Bond, Smelter Development	$ 371
PT-FI
Contractual Obligations Mining Contracts [Line Items]
Number of Extention Periods Available Under Mining Contract | extension	2
Period For Option To Extend Mining Contract	10 years
Gold And Silver Sales Royalty Rate	1.00%
Quantity of ore produced subject to additional royalties | T	0.2
Progressive Export Duty on Copper Concentrates, Lower Threshold, Percent	5.00%
Progressive Export Duty on Copper Concentrates, Higher Threshold, Percent	7.50%
Smelter Development Progress, Lower Threshold, Percent	7.50%
Smelter Development Progress, Higher Threshold, Percent	30.00%
Royalty Expense	$ 131	$ 114	$ 115
Export Duties Expense	$ 95	$ 109	$ 77
Incremental Percent of Undivided Interest Owned by Third Party	20.64%
PT-FI | Copper
Contractual Obligations Mining Contracts [Line Items]
Royalty Interest in Future Production	4.00%		3.50%
PT-FI | Gold
Contractual Obligations Mining Contracts [Line Items]
Royalty Interest in Future Production	3.75%		1.00%
PT-FI | Construction Contracts | Surety Bond
Contractual Obligations Mining Contracts [Line Items]
Assurance Bond, Smelter Development	$ 115
PT-FI | Minimum
Contractual Obligations Mining Contracts [Line Items]
Copper Royalty Rate Payable	1.50%
Price Of Copper Per Pound | $ / lb	0.90
PT-FI | Maximum
Contractual Obligations Mining Contracts [Line Items]
Copper Royalty Rate Payable	3.50%
Price Of Copper Per Pound | $ / lb	1.10