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Derivative Instruments and Risk Management (Details Textual) | 9 Months Ended |
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Sep. 30, 2012 T | Dec. 31, 2011 T
Derivative instruments and risk management (Textual) [Abstract] |  |
Maturity period of foreign currency forward exchange contracts | 4 years |
Commodity swaps, notional quantity | 525 | 2,075

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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- Definition High end period remaining until maturity for the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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