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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Tables)
 12 Months Ended
Dec. 31, 2017
Mineral Industries Disclosures [Abstract]  
Schedule Of Estimated Recoverable Proven And Probable Reserves By Location [Text Block]
 
Recoverable Proven and Probable Mineral Reserves

 
Estimated at December 31, 2017
 
Coppera
(billion pounds)
 
Gold
(million ounces)
 
Molybdenum
(billion pounds)
North America
33.5

 
0.3

 
2.22

South America
28.1

 
—

 
0.62

Indonesiab
25.1

 
23.2

 
—

Consolidatedc
86.7

 
23.5

 
2.84

 
 
 
 
 
 
Net equity interestd
71.3

 
21.3

 
2.56

a.
Consolidated recoverable copper reserves included 2.1 billion pounds in leach stockpiles and 0.7 billion pounds in mill stockpiles.
b.
Recoverable proven and probable reserves reflect estimates of minerals that can be recovered through the end of 2041 (refer to Note 13 for discussion of PT-FI’s COW).
c.
Consolidated reserves represent estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia (refer to Note 3 for further discussion of FCX’s joint ventures). Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 273.4 million ounces of silver, which were determined using $15 per ounce.
d.
Net equity interest reserves represent estimated consolidated metal quantities further reduced for noncontrolling interest ownership (refer to Note 3 for further discussion of FCX’s ownership in subsidiaries). Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 218.2 million ounces of silver.
Supplementary Reserve Information at 100% Basis by Location
 
 
Recoverable Proven and Probable Mineral Reserves
 
 
Estimated at December 31, 2017
 
 
 
 
Average Ore Grade
Per Metric Tona
 
Recoverable Proven and
Probable Reservesb
 
 
Orea
(million metric tons)
 
Copper (%)
 
Gold (grams)
 
Molybdenum (%)
 
Copper
(billion pounds)
 
Gold
(million ounces)
 
Molybdenum
(billion pounds)
North America
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed and producing:
 
 
 
 
 
 
 
 
 
 
 
 
Morenci
 
3,134

 
0.26

 
—

 
—

c 
11.8

 
—

 
0.14

Sierrita
 
2,245

 
0.23

 
—

c 
0.03

 
9.9

 
0.1

 
1.01

Bagdad
 
1,405

 
0.31

 
—

c 
0.02

 
7.5

 
0.1

 
0.36

Safford, including
Lone Stard
 
662

 
0.45

 
—

 
—

 
5.0

 
—

 
—

Chino, including Cobred
 
276

 
0.46

 
0.02

 
—

c 
2.4

 
0.1

 
0.01

Climax
 
160

 
—

 
—

 
0.15

 
—

 
—

 
0.50

Henderson
 
74

 
—

 
—

 
0.17

 
—

 
—

 
0.24

Tyrone
 
9

 
0.42

 
—

 
—

 
0.1

 
—

 
—

Miami
 
—

 
—

 
—

 
—

 
0.1

 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
South America
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed and producing:
 
 
 
 
 
 
 
 
 
 
 
 
Cerro Verde
 
3,577

 
0.37

 
—

 
0.01

 
25.6

 
—

 
0.62

El Abra
 
394

 
0.44

 
—

 
—

 
2.5

 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Indonesiae
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed and producing:
 
 
 
 
 
 
 
 
 
 
Deep Mill Level Zone
 
437

 
0.91

 
0.76

 
—

 
7.7

 
8.5

 
—

Deep Ore Zone
 
79

 
0.54

 
0.76

 
—

 
0.9

 
1.6

 
—

Big Gossan
 
58

 
2.22

 
0.93

 
—

 
2.6

 
1.2

 
—

Grasberg open pit
 
34

 
1.29

 
2.64

 
—

 
1.1

 
2.7

 
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Under development:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Grasberg Block Cave

 
963

 
1.01

 
0.72

 
—

 
18.1

 
14.5

 
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Undeveloped:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Kucing Liar
 
360

 
1.25

 
1.07

 
—

 
8.4

 
5.4

 
—

Total 100% basis
 
13,867

 
 
 
 
 
 
 
103.7

 
34.2

 
2.88

Consolidatedf
 
 
 
 
 
 
 
 
 
86.7

 
23.5

 
2.84

FCX’s equity shareg
 
 
 
 
 
 
 
 
 
71.3

 
21.3

 
2.56

a.
Excludes material contained in stockpiles.
b.
Includes estimated recoverable metals contained in stockpiles.
c.
Amounts not shown because of rounding.
d.
The Lone Star oxide project is under development, and the Cobre ore body is undeveloped.
e.
Recoverable proven and probable reserves reflect estimates of minerals that can be recovered through the end of 2041 (refer to Note 13 for discussion of PT-FI’s COW).
f.
Consolidated reserves represent estimated metal quantities after reduction for joint venture partner interests at the Morenci mine in North America and the Grasberg minerals district in Indonesia. Refer to Note 3 for further discussion of FCX’s joint ventures.
g.
Net equity interest reserves represent estimated consolidated metal quantities further reduced for noncontrolling interest ownership. Refer to Note 3 for further discussion of FCX’s ownership in subsidiaries.