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Financial Instruments Gain (Loss) Recognized on Derivatives Not Designated as Hedging Table (Details) (Not Designated as Hedging Instrument [Member], Net Gain from Investment Activities [Member], USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended				3 Months Ended				6 Months Ended				3 Months Ended				6 Months Ended				3 Months Ended				6 Months Ended				3 Months Ended				6 Months Ended				3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012 Equity Contract [Member]		Jun. 30, 2011 Equity Contract [Member]		Jun. 30, 2012 Equity Contract [Member]		Jun. 30, 2011 Equity Contract [Member]		Jun. 30, 2012 Foreign Exchange Contract [Member]		Jun. 30, 2011 Foreign Exchange Contract [Member]		Jun. 30, 2012 Foreign Exchange Contract [Member]		Jun. 30, 2011 Foreign Exchange Contract [Member]		Jun. 30, 2012 Credit Risk Contract [Member]		Jun. 30, 2011 Credit Risk Contract [Member]		Jun. 30, 2012 Credit Risk Contract [Member]		Jun. 30, 2011 Credit Risk Contract [Member]		Jun. 30, 2012 Futures Index Spread [Member]		Jun. 30, 2011 Futures Index Spread [Member]		Jun. 30, 2012 Futures Index Spread [Member]		Jun. 30, 2011 Futures Index Spread [Member]		Jun. 30, 2012 Commodity contracts [Member]		Jun. 30, 2011 Commodity contracts [Member]		Jun. 30, 2012 Commodity contracts [Member]		Jun. 30, 2011 Commodity contracts [Member]		Dec. 31, 2011 Investment segment and Icahn Enterprises Holdings [Member]		Dec. 31, 2010 Investment segment and Icahn Enterprises Holdings [Member]		Dec. 31, 2009 Investment segment and Icahn Enterprises Holdings [Member]		Dec. 31, 2011 Investment segment and Icahn Enterprises Holdings [Member] Equity Contract [Member]		Dec. 31, 2010 Investment segment and Icahn Enterprises Holdings [Member] Equity Contract [Member]		Dec. 31, 2009 Investment segment and Icahn Enterprises Holdings [Member] Equity Contract [Member]		Dec. 31, 2011 Investment segment and Icahn Enterprises Holdings [Member] Interest Rate Contract [Member]		Dec. 31, 2010 Investment segment and Icahn Enterprises Holdings [Member] Interest Rate Contract [Member]		Dec. 31, 2009 Investment segment and Icahn Enterprises Holdings [Member] Interest Rate Contract [Member]		Dec. 31, 2011 Investment segment and Icahn Enterprises Holdings [Member] Foreign Exchange Contract [Member]		Dec. 31, 2010 Investment segment and Icahn Enterprises Holdings [Member] Foreign Exchange Contract [Member]		Dec. 31, 2009 Investment segment and Icahn Enterprises Holdings [Member] Foreign Exchange Contract [Member]		Dec. 31, 2011 Investment segment and Icahn Enterprises Holdings [Member] Credit Risk Contract [Member]		Dec. 31, 2010 Investment segment and Icahn Enterprises Holdings [Member] Credit Risk Contract [Member]		Dec. 31, 2009 Investment segment and Icahn Enterprises Holdings [Member] Credit Risk Contract [Member]		Dec. 31, 2011 Investment segment and Icahn Enterprises Holdings [Member] Futures Index Spread [Member]		Dec. 31, 2010 Investment segment and Icahn Enterprises Holdings [Member] Futures Index Spread [Member]		Dec. 31, 2009 Investment segment and Icahn Enterprises Holdings [Member] Futures Index Spread [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 5	[1]	$ 7	[1]	$ (438)	[1]	$ 39	[1]	$ (59)	[1]	$ 1	[1]	$ (461)	[1]	$ 10	[1]	$ 66	[1]	$ (2)	[1]	$ 25	[1]	$ (13)	[1]	$ 0	[1]	$ (6)	[1]	$ 0	[1]	$ 19	[1]	$ 0	[1]	$ 14	[1]	$ 0	[1]	$ 23	[1]	$ (2)	[1]	$ 0	[1]	$ (2)	[1]	$ 0	[1]	$ 6	[1]	$ 31	[1]	$ 315	[1]	$ (39)	[1]	$ 2	[1]	$ (58)	[1]	$ 0	[1]	$ 0	[1]	$ 57	[1]	$ 7	[1]	$ (12)	[1]	$ (7)	[1]	$ 18	[1]	$ 38	[1]	$ 323	[1]	$ 20	[1]	$ 3	[1]	$ 0	[1]
[1] Gains (losses) recognized on derivatives are classified in net gain from investment activities in our consolidated statements of operations.

X

- Definition

Net gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(1)(b)

-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.

+ Details

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X

- Details

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