Contingencies - Additional Information (Detail)	3 Months Ended				1 Months Ended										3 Months Ended				3 Months Ended
	Mar. 23, 2013 USD ($) LegalMatter	Mar. 23, 2013 EUR (€)	Dec. 31, 2012 USD ($)	Mar. 24, 2012 USD ($)	Jan. 12, 2009 NICARAGUA USD ($) LegalMatter	Nov. 14, 2007 NICARAGUA USD ($) LegalMatter	Aug. 20, 2005 NICARAGUA USD ($) LegalMatter	Mar. 17, 2005 NICARAGUA USD ($) LegalMatter	Jun. 15, 2004 NICARAGUA USD ($) LegalMatter	Jun. 14, 2004 NICARAGUA USD ($) LegalMatter	May 30, 2004 NICARAGUA USD ($) LegalMatter	May 25, 2004 NICARAGUA USD ($) LegalMatter	Feb. 25, 2004 NICARAGUA USD ($) LegalMatter	Dec. 11, 2002 NICARAGUA USD ($) LegalMatter	Mar. 23, 2013 NICARAGUA USD ($) LegalMatter	Mar. 23, 2013 NICARAGUA Active LegalMatter	Mar. 23, 2013 Interest Portion USD ($)	Dec. 31, 2012 Interest Portion USD ($)	May 23, 2013 Subsequent Event Employee Severance USD ($)	Mar. 23, 2013 Segment, Discontinued Operations USD ($)
Loss Contingencies [Line Items]
Guarantees related to amounts advanced under third party bank agreements	$ 5,000,000
Total Letter of Credit, bank guarantee and bonds outstanding	183,200,000																			10,400,000
Guarantees related to subsidiaries' obligation	130,700,000																			22,400,000
Restructuring Charges				1,331,000															5,300,000
Restructuring Charges, reserve																			29,700,000
Number of lawsuits in various stages of proceedings	196	196
Number of labor cases pending	81	81
Lawsuits not included under tentative settlement description															Of the 196 lawsuits, 16 are currently pending in various jurisdictions in the United States.
Number of cases dismissed															1
Claimed damages value															36,000,000,000
Percentage of Claimed Damage In Nicaragua															85.00%
Number of claims filed															165	13
Number of cases in which attorney general formally opined are unconstitutional															3
Number of cases active					8	1	1	1	1	1	1	1	1	9	25
Number of claimants					417	192	62	36	85	72	4	20	58	465
Claim settlement					357,700,000	38,400,000	46,400,000	27,700,000	64,800,000	56,500,000	4,000,000	15,700,000	82,900,000	489,400,000
Cases resulted in judgment description															Twenty-five cases have resulted in judgments in Nicaragua $489.4 million (nine cases consolidated with 465 claimants) on December 11, 2002; $82.9 million (one case with 58 claimants) on February 25, 2004; $15.7 million (one case with 20 claimants)
Amount of judgment in which company will file appeal															357,700,000
Fines imposed under antitrust laws	42,400,000	45,600,000	30,000,000														8,700,000	4,000,000
Number of offices in which search is carried out	2	2
Provisional payment	10,000,000	7,600,000	10,000,000
Annual bank guarantee renewal interest rate	6.15%	6.15%
Percentage of letter of credit	2.375%	2.375%
Amount of tax assessment received relating to disposition of interest	$ 137,000,000
Period for which land owned and used for oil storage facility	40 years	40 years