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Derivative Financial Instruments (Details)
 3 Months Ended 12 Months Ended 3 Months Ended
Sep. 30, 2011
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2013
Interest rate cap contracts
USD ($)
Dec. 31, 2012
Interest rate cap contracts
USD ($)
Dec. 31, 2012
Interest rate swap contracts - Fixed-to-float/Float-to-fixed
USD ($)
Sep. 30, 2011
Interest rate swap contracts - Fixed-to-float/Float-to-fixed
USD ($)
Dec. 31, 2012
2022 Notes
Dec. 31, 2013
Aluminum
t
Dec. 31, 2012
Aluminum
t
Dec. 31, 2013
Copper
t
Dec. 31, 2012
Copper
t
Dec. 31, 2013
Natural Gas
MMBTU
Dec. 31, 2012
Natural Gas
MMBTU
Dec. 31, 2013
Steel
T
Dec. 31, 2012
Steel
T
Dec. 31, 2013
Canadian Dollar
Designated as Hedging Instrument [Member]
CAD
Dec. 31, 2012
Canadian Dollar
Designated as Hedging Instrument [Member]
CAD
Dec. 31, 2013
European Euro
Designated as Hedging Instrument [Member]
EUR (€)
Dec. 31, 2012
European Euro
Designated as Hedging Instrument [Member]
EUR (€)
Dec. 31, 2013
European Euro
Not designated as hedging instruments
EUR (€)
Dec. 31, 2012
European Euro
Not designated as hedging instruments
EUR (€)
Dec. 31, 2013
South Korean Won
Designated as Hedging Instrument [Member]
KRW
Dec. 31, 2012
South Korean Won
Designated as Hedging Instrument [Member]
KRW
Dec. 31, 2013
Singapore Dollar
Designated as Hedging Instrument [Member]
SGD
Dec. 31, 2012
Singapore Dollar
Designated as Hedging Instrument [Member]
SGD
Dec. 31, 2013
United States Dollar
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2012
United States Dollar
Designated as Hedging Instrument [Member]
USD ($)
Dec. 31, 2013
United States Dollar
Not designated as hedging instruments
USD ($)
Dec. 31, 2012
United States Dollar
Not designated as hedging instruments
USD ($)
Dec. 31, 2013
Chinese Renminbi
Designated as Hedging Instrument [Member]
CNY
Dec. 31, 2012
Chinese Renminbi
Designated as Hedging Instrument [Member]
CNY
Dec. 31, 2013
Chinese Renminbi
Not designated as hedging instruments
CNY
Dec. 31, 2013
Australia, Dollars
Not designated as hedging instruments
AUD
Dec. 31, 2012
British Pound
Not designated as hedging instruments
GBP (£)
Derivative financial instruments                                                                        
Estimated amount of unrealized gains, net of tax, related to interest rate, commodity price and currency rate hedging that will be reclassified from other comprehensive income into earnings   $ 1,600,000                                                                    
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                   1,622 1,382 382 515 214,277 158,670 11,503 10,041                                      
Derivative, Notional Amount                                   11,011,092 9,351,126 74,934,975 66,389,190 31,738,273 24,540,841 1,258,808,642 2,595,874,455 5,280,000 4,800,000 14,380,959 2,398,273 29,091,053 6,432,000 245,324,730 187,640,472 125,000,000 1,000,000 11,100,000
Derivatives swapped to floating interest rates         100,000,000 225,000,000                                                            
Cap on interest rate (as a percent)         3.00%                                                              
Description of variable interest rate one-month LIBOR                                                                      
Premium paid to enter into interest rate cap derivative contract         700,000                                                              
Proceeds from monetization of derivative asset related to the fixed-to-float interest rate swaps     $ 14,800,000 $ 21,500,000     $ 14,800,000 $ 21,500,000                                                        
Derivative, Fixed Interest Rate                 5.35%