ACQUISITIONS, DISPOSITIONS AND OTHER TRANSACTIONS (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2011 Al Hosn gas project	May 31, 2011 Al Hosn gas project	Nov. 30, 2012 BridgeTex bbl
Acquisitions, dispositions and other transactions
Aggregate oil storage capacity of pipeline to be constructed			2,600,000
Percentage of interest acquired in oil and gas properties and projects	40.00%
Term of joint venture agreement	30 years
Pre-acquisition development expenditures		$ 500