Derivatives (Details)	12 Months Ended
Derivatives (Details)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 Cash flow hedges USD ($)	Dec. 31, 2013 Derivatives designated as hedging instruments Fair value hedges USD ($)	Dec. 31, 2013 Derivatives designated as hedging instruments Fair value hedges Commodity contracts for inventory Long 2014 USD ($) bbl	Dec. 31, 2013 Derivatives designated as hedging instruments Fair value hedges Commodity contracts for inventory Short 2014 USD ($) bbl	Dec. 31, 2013 Derivatives not designated as hedging instruments USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Commodity contracts Long 2014 USD ($) bbl	Dec. 31, 2013 Derivatives not designated as hedging instruments Commodity contracts Long 2015 USD ($) bbl	Dec. 31, 2013 Derivatives not designated as hedging instruments Commodity contracts Short 2014 USD ($) bbl	Dec. 31, 2013 Derivatives not designated as hedging instruments Commodity contracts Short 2015 USD ($) bbl	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 AUD USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 AUD	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 BRL USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 BRL	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 CAD USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 CAD	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 CLP USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 CLP	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 COP USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 COP	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 EUR USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 EUR EUR (€)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 GBP USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 GBP GBP (£)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 INR USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 INR	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 JPY USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 JPY JPY (¥)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 MXN USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 MXN	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 PLN USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Long 2014 PLN	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 AUD USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 AUD	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 CAD USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 CAD	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 CLP USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 CLP	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 COP USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 COP	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 EUR USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 EUR EUR (€)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 GBP USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 GBP GBP (£)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 INR USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 INR	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 JPY USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 JPY JPY (¥)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 MXN USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 MXN	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 RON USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2014 RON	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2015 GBP USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts Short 2015 GBP GBP (£)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 68,422 Short 2014 DKK USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 68,422 Short 2014 DKK	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 37,000 Short 2014 DKK USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 37,000 Short 2014 DKK	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 42,500 Short 2014 NOK USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 42,500 Short 2014 NOK	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 41,041 Short 2014 NOK USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 41,041 Short 2014 NOK	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 29,931 Short 2014 SGD USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 29,931 Short 2014 SGD	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 24,708 Short 2014 SGD USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 24,708 Short 2014 SGD	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 40,000 Short 2014 ZAR USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 40,000 Short 2014 ZAR	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 115,020 Short 2014 ZAR USD ($)	Dec. 31, 2013 Derivatives not designated as hedging instruments Foreign currency contracts with notional value of 115,020 Short 2014 ZAR
Derivatives
Net gain associated with our outstanding cash flow hedges		$ 100,000
Net gain related to the ineffectiveness between the entity's derivative hedging instruments and hedged items	700,000	1,000,000
Net gain (loss) related to non-designated derivative positions	2,900,000	9,800,000
Derivative instruments, at their respective fair value positions
Fair value of cash flow hedge commodity contracts			0
Notional value of commodity contracts					829,000	2,408,000		21,201,000	855,000	22,110,000	711,000
Non-Designated, Notional amount of foreign currency contracts													7,306,000		5,163,000		16,455,000		2,050,646,000		21,721,361,000		9,380,000		135,817,000		18,569,000		393,196,000		1,247,152,000		2,558,000		14,846,000		6,143,000		3,623,136,000		22,377,451,000		32,640,000		201,321,000		111,367,000		480,270,000		1,074,000,000		17,409,000		2,900,000		68,422,000		37,000,000		42,500,000		41,041,000		29,931,000		24,708,000		40,000,000		115,020,000
Weighted Average Fixed Price					97.07	120.21		76.85	66.61	81.56	96.45	0.93		2.35		1.05		522.03		1,924.54		1.36		1.62		62.00		100.37		13.12		3.09		0.92		1.05		526.58		1,919.11		1.36		1.61		63.39		100.70		13.06		3.29		1.59		5.49		5.51		6.14		6.09		1.25		1.25		9.95		10.21
Weighted Average Mark-to-Market					0.731	(0.588)		1.536	2.743	(1.208)	(2.745)	(0.045)		0.002		0.022		0.000		0.000		0.012		0.040		0.000		(0.001)		0.000		(0.009)		0.031		(0.011)		0.000		0.000		(0.013)		(0.046)		0.000		0.001		0.000		(0.003)		(0.051)		0.002		(0.003)		0.002		0.001		(0.006)		0.009		(0.005)		0.003
Fair value hedge commodity contracts					606,000	(1,415,000)
Fair value of non-designated commodity contracts								32,558,000	2,345,000	(26,703,000)	(1,952,000)
Mark-to-Market value of non-designated foreign currency contracts												(332,000)		10,000		367,000		88,000		40,000		108,000		5,433,000				(214,000)		78,000		(23,000)		463,000		(69,000)		5,000		(71,000)		(414,000)		(9,242,000)		(38,000)		336,000		70,000		(55,000)		(147,000)		133,000		(105,000)		83,000		35,000		(171,000)		222,000		(200,000)		293,000
Mark-to-Market, Total				$ (809,000)			$ 2,931,000