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DERIVATIVE INSTRUMENTS: (Tables)

6 Months Ended

Jun. 30, 2012

DERIVATIVE INSTRUMENTS:

Copper derivative activity related to copper sales transactions

		Second quarter					First six months
		2012		2011			2012			2011
Zero cost collar contracts:
Pounds (in millions)		—		105.8			46.3			211.6
Average LME cap price		—		$	4.84		$	5.18		$	4.84
Average LME floor price		—		$	3.02		$	3.50		$	3.02
Swap contracts:		—
Pounds (in millions)		—		112.4			—			232.0
Weighted average COMEX price		—		$	4.08		—			$	4.08
Realized loss on copper derivatives (in millions)		—		$	8.6		—			$	44.3

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- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 205G

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

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-Section 50

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44C

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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