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Contingencies and Commitments (Unaudited) (Tables)
 9 Months Ended
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Charges for the Cerro Verde Royalty Dispute
A summary of the charges recorded in third-quarter 2017 for the Cerro Verde royalty dispute follows (in millions):
Royalty and related assessment charges:
 
 
 
 
Production and delivery
 
$
216

a 
 
Interest expense, net
 
141

 
 
Provision for income taxes
 
2

b 
Net loss attributable to noncontrolling interests
 
(171
)
 
 
 
 
$
188

 
a.
Includes $176 million related to disputed royalty assessments for the period from December 2006 to September 2011 (when royalties were determined based on revenues), $6 million of penalties related to the December 2006 to December 2008 royalty assessments and $34 million primarily associated with the net assets tax.
b.
Includes tax charges of $127 million for disputed royalties ($64 million) and other related mining taxes ($63 million) for the period October 2011 through the year 2013 when royalties were determined based on operating income, mostly offset by a tax benefit of $125 million associated with disputed royalties and other related mining taxes for the period December 2006 through the year 2013.