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

Derivative Liability, Additions, Notional Amount

+ References

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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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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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.

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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.

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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.

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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.

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Derivative Financial Instruments (Details)	9 Months Ended			3 Months Ended			3 Months Ended
Derivative Financial Instruments (Details)	Sep. 30, 2013 USD ($)	Sep. 30, 2013 Interest rate cap contracts USD ($)	Dec. 31, 2012 Interest rate cap contracts USD ($)	Jun. 30, 2013 Senior Notes, Due 2022 [Member] Derivatives in Fair Value Hedging Relationships USD ($)	Sep. 30, 2013 Senior Notes, Due 2022 [Member] Derivatives in Fair Value Hedging Relationships USD ($)	Dec. 31, 2012 Senior Notes, Due 2022 [Member] Derivatives in Fair Value Hedging Relationships USD ($)	Jun. 30, 2013 Senior Notes, Due 2020 [Member] Derivatives in Fair Value Hedging Relationships USD ($)	Sep. 30, 2013 Senior Notes, Due 2020 [Member] Derivatives in Fair Value Hedging Relationships USD ($)	Sep. 30, 2013 Aluminum t	Dec. 31, 2012 Aluminum t	Sep. 30, 2013 Copper t	Dec. 31, 2012 Copper t	Sep. 30, 2013 Natural Gas MMBTU	Dec. 31, 2012 Natural Gas MMBTU	Sep. 30, 2013 Steel T	Dec. 31, 2012 Steel T	Sep. 30, 2013 Canadian Dollar CAD	Dec. 31, 2012 Canadian Dollar CAD	Sep. 30, 2013 European Euro EUR (€)	Dec. 31, 2012 European Euro EUR (€)	Sep. 30, 2013 South Korean Won KRW	Dec. 31, 2012 South Korean Won KRW	Sep. 30, 2013 Singapore Dollar SGD	Dec. 31, 2012 Singapore Dollar SGD	Sep. 30, 2013 United States Dollar USD ($)	Dec. 31, 2012 United States Dollar USD ($)	Sep. 30, 2013 Chinese Renminbi CNY	Dec. 31, 2012 Chinese Renminbi CNY	Sep. 30, 2013 United Kingdom, Pounds GBP (£)	Dec. 31, 2012 United Kingdom, Pounds GBP (£)	Sep. 30, 2013 Japan, Yen JPY (¥)	Dec. 31, 2012 Japan, Yen JPY (¥)	Sep. 30, 2013 Switzerland, Francs CHF	Dec. 31, 2012 Switzerland, Francs CHF
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	$ 900,000
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									1,715	1,382	417	515	201,946	158,670	14,054	10,041
Short currency units hedged																	10,079,738	9,351,126	114,968,295	66,389,190	2,211,098,418	2,595,874,455	4,800,000	4,800,000	246,399	2,398,273	76,791,282	187,640,472
Notional Amount of Interest Rate Cash Flow Hedge Derivatives		150,000,000	225,000,000
Cap on interest rate (as a percent)		3.00%
Description of variable interest rate		LIBOR
Derivatives swapped to floating interest rates					125,000,000	100,000,000		75,000,000
Derivative Liability, Additions, Notional Amount				25,000,000			75,000,000
Notional amount of foreign currency derivatives not designated as Hedging Instruments																			€ 30,411,329	€ 24,540,841					$ 42,739,909	$ 6,432,000	125,000,000	0	£ 0	£ 11,100,000	¥ 200,000,000	¥ 0	25,563,763	0