The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

ACQUISITIONS AND DIVESTITURES - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended		9 Months Ended
	Apr. 30, 2012 acre	Sep. 30, 2012	Jan. 31, 2012 Burrup Holdings Limited [Member]	Sep. 30, 2012 Yara International [Member]
Business Acquisition [Line Items]
Cordillera's properties include approximately 312,000 net acres	312,000
Shares of common stock issued seller	6,272,667
Cash paid to seller		$ 2,700,000,000
Year from the acquisition date		1 year
Percentage of ownership			49.00%
Ownership percentage by other party				51.00%
Amount paid for acquisition			$ 439,000,000