Acquisitions and Divestitures - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended	0 Months Ended				3 Months Ended	0 Months Ended		1 Months Ended			1 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013 bbl MMcf	Apr. 30, 2014 Subsequent Event [Member] acre	May 01, 2014 Freeport McMoRan Oil & Gas Subsidiary [Member] Subsequent Event [Member]	Mar. 12, 2014 YPF Sociedad Anonima [Member]	Jun. 30, 2013 YPF Sociedad Anonima [Member]	Mar. 31, 2014 Sinopec [Member]	Sep. 30, 2013 Fieldwood Energy Llc [Member]	Nov. 14, 2013 Egypt Oil And Gas [Member] Sinopec [Member]	Feb. 28, 2013 Kitimat LNG [Member]	Feb. 28, 2013 Kitimat LNG [Member] Horn River and Liard Basins [Member] acre	Sep. 30, 2013 Kitimat LNG [Member] Fieldwood Energy Llc [Member]	Feb. 28, 2013 Kitimat LNG [Member] Chevron Canada and Apache Canada [Member]
Business Acquisition [Line Items]
Sale of oil and gas assets				$ 374,000,000	$ 1,400,000,000
Effective date of the transaction	Jan. 01, 2014
Gas properties sold				328,400
Working interest percentage				100.00%
Natural gas production from fields to be divested			101
Hydrocarbon production from fields to be divested			1,500
Proceeds from sale of Operations						800,000,000			3,700,000,000	2,950,000,000
Liabilities assumed							52,000,000		1,500,000,000
Net income attributable to noncontrolling interest	98,000,000							98,000,000
Proceeds as noncontrolling interest	2,095,000,000		1,997,000,000					1,900,000,000
Percentage of ownership interest in assets													50.00%
Percentage of ownership														50.00%
Business properties held												644,000
Proceeds from transaction		405,000,000									396,000,000
Proceeds from limited partnership														$ 0