Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

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

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- Definition

The minimum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions.

+ References

No definition available.

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

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- Definition

The reference rate for the variable rate of the interest rate derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

Total monetary amount specified by the derivative liability (or liabilities). Expressed as an absolute value.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

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- Definition

Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Aggregate notional amount of all foreign currency derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

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- Definition

Aggregate notional amount of all foreign currency derivatives not designated as hedging instruments. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ References

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- Definition

Aggregate notional amount of all interest rate derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the monetary amount specified in the interest rate derivative contract.

+ References

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Derivative Financial Instruments (Details)	3 Months Ended
Derivative Financial Instruments (Details)	Mar. 31, 2013 USD ($)	Mar. 31, 2013 Interest rate cap contracts USD ($)	Dec. 31, 2012 Interest rate cap contracts USD ($)	Mar. 31, 2013 Senior Notes, Due 2022 [Member] Derivatives in Fair Value Hedging Relationships USD ($)	Dec. 31, 2012 Senior Notes, Due 2022 [Member] Derivatives in Fair Value Hedging Relationships USD ($)	Mar. 31, 2013 Aluminum t	Dec. 31, 2012 Aluminum t	Mar. 31, 2013 Copper t	Dec. 31, 2012 Copper t	Mar. 31, 2013 Natural Gas MMBTU	Dec. 31, 2012 Natural Gas MMBTU	Mar. 31, 2013 Steel T	Dec. 31, 2012 Steel T	Mar. 31, 2013 Canadian Dollar CAD	Dec. 31, 2012 Canadian Dollar CAD	Mar. 31, 2013 European Euro USD ($)	Mar. 31, 2013 European Euro EUR (€)	Dec. 31, 2012 European Euro USD ($)	Dec. 31, 2012 European Euro EUR (€)	Mar. 31, 2013 South Korean Won KRW	Dec. 31, 2012 South Korean Won KRW	Mar. 31, 2013 Singapore Dollar SGD	Dec. 31, 2012 Singapore Dollar SGD	Mar. 31, 2013 United States Dollar USD ($)	Dec. 31, 2012 United States Dollar USD ($)	Mar. 31, 2013 Chinese Renminbi USD ($)	Mar. 31, 2013 Chinese Renminbi CNY	Dec. 31, 2012 Chinese Renminbi USD ($)	Dec. 31, 2012 Chinese Renminbi CNY	Mar. 31, 2013 United Kingdom, Pounds USD ($)	Dec. 31, 2012 United Kingdom, Pounds USD ($)
Derivative financial instruments
Estimated amount of unrealized losses, net of tax, related to interest rate, commodity price and currency rate hedging that will be reclassified from other comprehensive income into earnings	$ (1,700,000)
Hedge period, low end of the range (in months)	12 months
Hedge period, high end of the range (in months)	24 months
Commodity units hedged						1,440	1,382	489	515	119,259	158,670	9,337	10,041
Short currency units hedged														13,901,502	9,351,126		92,098,840		66,389,190	2,871,077,158	2,595,874,455	4,800,000	4,800,000	1,316,397	2,398,273		120,026,757		187,640,472
Notional Amount of Interest Rate Cash Flow Hedge Derivatives		225,000,000	225,000,000
Cap on interest rate (as a percent)		3.00%
Description of variable interest rate		LIBOR
Derivatives swapped to floating interest rates				100,000,000	100,000,000
Notional amount of foreign currency derivatives not designated as Hedging Instruments																$ 30,005,131		$ 24,540,841						$ 8,817,000	$ 6,432,000	$ 65,000,000		$ 0		$ 9,100,000	$ 11,100,000