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SUPPLEMENTARY MINERAL RESERVE INFORMATION (UNAUDITED) (Tables)
 12 Months Ended
Dec. 31, 2014
Supplementary Mineral Reserve Information [Abstract]  
Estimated Recoverable Proven and Probable Reserves by Location
 
Recoverable Proven and Probable Mineral Reserves

 
Estimated at December 31, 2014
 
Coppera
(billion pounds)
 
Gold
(million ounces)
 
Molybdenum
(billion pounds)
North America
35.6

 
0.3

 
2.42

South America
31.8

 
—

 
0.69

Indonesia
29.0

 
28.2

 
—

Africa
7.1

 
—

 
—

Consolidatedb
103.5

 
28.5

 
3.11

 
 
 
 
 
 
Net equity interestc
82.8

 
25.9

 
2.79

a.
Consolidated recoverable copper reserves included 3.6 billion pounds in leach stockpiles and 0.9 billion pounds in mill stockpiles.
b.
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. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.85 billion pounds of cobalt at Tenke and 282.9 million ounces of silver in Indonesia, South America and North America, which were determined using long-term average prices of $10 per pound for cobalt and $15 per ounce for silver.
c.
Net equity interest reserves represent estimated consolidated metal quantities further reduced for noncontrolling interest ownership. Excluded from the table above were FCX’s estimated recoverable proven and probable reserves of 0.47 billion pounds of cobalt at Tenke and 232.4 million ounces of silver in Indonesia, South America and North America.
Supplementary Reserve Information at 100% Basis by Location
 
 
Recoverable Proven and Probable Mineral Reserves
 
 
Estimated at December 31, 2014
 
 
 
 
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
 
3,923

 
0.27
 
—

 
—
c 
15.1

 
—

 
0.17

Bagdad
 
1,334

 
0.32
 
—

c 
0.02
 
7.8

 
0.1

 
0.38

Safford
 
122

 
0.47
 
—

 
—
 
1.1

 
—

 
—

Sierrita
 
2,464

 
0.23
 
—

c 
0.02
 
10.8

 
0.1

 
1.01

Miami
 
3

 
0.58
 
—

 
—
 
0.1

 
—

 
—

Chino
 
301

 
0.39
 
0.02

 
—
c 
2.2

 
0.1

 
0.01

Tyrone
 
59

 
0.32
 
—

 
—
 
0.4

 
—

 
—

Henderson
 
90

 
—
 
—

 
0.17
 
—

 
—

 
0.28

Climax
 
185

 
—
 
—

 
0.16
 
—

 
—

 
0.59

Undeveloped:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cobre
 
71

 
0.37
 
—

 
—
 
0.3

 
—

 
—

South America
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed and producing:
 
 
 
 
 
 
 
 
 
 
 
 
Cerro Verde
 
3,953

 
0.37
 
—

 
0.01
 
28.9

 
—

 
0.69

El Abra
 
444

 
0.46
 
—

 
—
 
2.9

 
—

 
—

Indonesia
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed and producing:
 
 
 
 
 
 
 
 
 
 
 
 
Grasberg open pit
 
179

 
0.96
 
1.06

 
—
 
3.2

 
4.9

 
—

Deep Ore Zone
 
146

 
0.54
 
0.69

 
—
 
1.5

 
2.5

 
—

Big Gossan
 
54

 
2.26
 
0.99

 
—
 
2.4

 
1.1

 
—

Undeveloped:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Grasberg Block Cave
 
1,012

 
1.00
 
0.77

 
—
 
18.9

 
16.3

 
—

Kucing Liar
 
406

 
1.25
 
1.07

 
—
 
9.5

 
6.3

 
—

Deep Mill Level Zone
 
472

 
0.87
 
0.71

 
—
 
7.9

 
8.6

 
—

Africa
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed and producing:
 
 
 
 
 
 
 
 
 
 
 
 
Tenke Fungurume
 
98

 
3.27
 
—

 
—
 
7.1

 
—

 
—

Total 100% basis
 
15,316

 
 
 
 
 
 
 
120.1

 
40.0

 
3.13

Consolidatedd
 
 
 
 
 
 
 
 
 
103.5

 
28.5

 
3.11

FCX’s equity sharee
 
 
 
 
 
 
 
 
 
82.8

 
25.9

 
2.79

a.
Excludes material contained in stockpiles.
b.
Includes estimated recoverable metals contained in stockpiles.
c.
Amounts not shown because of rounding.
d.
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.
e.
Net equity interest reserves represent estimated consolidated metal quantities further reduced for noncontrolling interest ownership.