SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Proposed Acquisitions) (Details) (USD $)	12 Months Ended	3 Months Ended		3 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Plains Exploration & Production Company [Member]	Dec. 05, 2012 Plains Exploration & Production Company [Member]	Dec. 31, 2012 McMoRan Exploration Co [Member]	Dec. 05, 2012 McMoRan Exploration Co [Member]	Feb. 14, 2013 Issuance of Debt [Member] Bridge Loan [Member]	Dec. 05, 2012 Issuance of Debt [Member] Bridge Loan [Member]	Feb. 14, 2013 Issuance of Debt [Member] Bank Term Loan [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		91,000,000
Business Acquisition, Date of Acquisition Agreement	Dec. 05, 2012
Business Acquisition, Agreed-Upon Equity Interest Issued or Issuable, Number of Shares Per Share of Target Company		0.6531
Business Acquisitions, Agreed-Upon Cost of Entity Acquired, Cash Paid Per Share			$ 25.00		$ 14.75
Business Acquistion, Agreed-Upon Cost of Entity Acquired, Cash Paid			$ 3,400,000,000		$ 3,400,000,000
Business Acqusition, Agree-Upon Cost of Entity Acquired, Cash Paid, Net of Pro-Forma Existing Interests Held					2,100,000,000
Buinsess Acquisition, Agreed-Upon Royalty Trust Units Issued or Issuable, Per Share of Target Company				1.15
Debt Instrument, Face Amount						$ 5,500,000,000	$ 9,500,000,000	$ 4,000,000,000