Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

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- Definition

Nominal mass used to calculate payments on a derivative instrument.

+ References

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Derivative Financial Instruments - Schedule of Outstanding Commodity and Currency Forward Contracts (Detail)	12 Months Ended
	Dec. 31, 2015 CAD MMBTU T	Dec. 31, 2014 CAD MMBTU T	Dec. 31, 2013 USD ($) MMBTU T	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 MXN	Dec. 31, 2015 GBP (£)	Dec. 31, 2014 EUR (€)	Dec. 31, 2014 MXN	Dec. 31, 2013 CAD	Dec. 31, 2013 EUR (€)
Commodity contracts \| Designated as Hedging Instrument \| Aluminum
Derivative [Line Items]
Commodity units hedged, mass	1,215,000	1,657,000	1,622,000
Commodity contracts \| Designated as Hedging Instrument \| Copper
Derivative [Line Items]
Commodity units hedged, mass	472,000	820,000	382,000
Commodity contracts \| Designated as Hedging Instrument \| Natural Gas
Derivative [Line Items]
Commodity units hedged, energy \| MMBTU	49,396	56,792	149,994
Commodity contracts \| Designated as Hedging Instrument \| Steel
Derivative [Line Items]
Commodity units hedged, mass	11,073	12,634	8,806
Foreign currency exchange contracts \| Designated as Hedging Instrument \| Canadian Dollar
Derivative [Line Items]
Currency units hedged \| CAD	CAD 587,556	CAD 7,984,824							CAD 10,422,932
Foreign currency exchange contracts \| Designated as Hedging Instrument \| European Euro
Derivative [Line Items]
Currency units hedged \| €				€ 231,810						€ 13,447,750
Foreign currency exchange contracts \| Designated as Hedging Instrument \| Great British Pound
Derivative [Line Items]
Currency units hedged \| £						£ 113,115
Foreign currency exchange contracts \| Designated as Hedging Instrument \| Mexican Peso
Derivative [Line Items]
Currency units hedged \| MXN					MXN 28,504,800			MXN 52,674,383
Foreign currency exchange contracts \| Designated as Hedging Instrument \| United States Dollar
Derivative [Line Items]
Currency units hedged \| $			$ 2,100,000
Foreign currency exchange contracts \| Not Designated as Hedging Instrument \| Canadian Dollar
Derivative [Line Items]
Currency units hedged \| CAD	CAD 1,117,850	CAD 2,516
Foreign currency exchange contracts \| Not Designated as Hedging Instrument \| European Euro
Derivative [Line Items]
Currency units hedged \| €							€ 2,172,068
Foreign currency exchange contracts \| Not Designated as Hedging Instrument \| Mexican Peso
Derivative [Line Items]
Currency units hedged \| MXN								MXN 3,151,000