Subsequent Events	3 Months Ended
Mar. 31, 2012
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events. CVR Energy Inc. On April 18, 2012, IEP Energy LLC (“IEP Energy”), an indirect subsidiary of Icahn Enterprises, and certain affiliates of ours (collectively with IEP Energy, the “IEP Parties”), entered into a Transaction Agreement (the “Transaction Agreement”) with CVR Energy, Inc. (“CVR”). Pursuant to the Transaction Agreement, on April 23, 2012, IEP Energy amended its pending tender offer (the “Offer”) to purchase all of the issued and outstanding shares of CVR's common stock (the “Shares”) for a price of $30 per Share in cash plus one non-transferable contingent cash payment right for each Share (the “CCP”), which represents the contractual right to receive an additional cash payment per Share if a definitive agreement for the sale of CVR is executed within 15 months following the expiration of the Offer and such transaction closes. The Offer, as amended, will expire at 11:59 p.m., New York City time, on May 4, 2012 (the “Expiration Date”). The Offer is conditioned upon there being validly tendered and not properly withdrawn, as of immediately prior to 11:59 p.m. on the Expiration Date, at least 31,661,040 Shares, which when added to the Shares already owned by IEP Energy and its affiliates, represents a majority of the Shares (the “Minimum Condition”). The Transaction Agreement provides that if the Minimum Condition is not satisfied as of immediately prior to 11:59 p.m. on the Expiration Date, and CVR has complied in all material respects with its obligations under the Transaction Agreement, the IEP Parties must immediately terminate the Offer and discontinue their previously announced intention to replace all nine directors on CVR's board of directors (the “Board”) at CVR's 2012 annual meeting of stockholders (the “CVR 2012 Annual Meeting”) and not present any other proposal for consideration at the CVR 2012 Annual Meeting. If, following the closing of the Offer, the Minimum Condition is satisfied but IEP Energy holds less than 90% of the outstanding Shares, the Transaction Agreement requires IEP Energy to provide for a ten-business-day subsequent offering period during which stockholders who did not previously tender will have a second opportunity to tender their Shares for the same consideration of $30 per Share plus the CCP (the “Subsequent Offering Period”). If, following the closing of the Offer or the Subsequent Offering Period, IEP Energy holds at least 90% of the outstanding Shares, IEP Energy is required to cause a short-form merger of CVR under Section 253 of the Delaware General Corporation Law (the “Short-Form Merger”). If the Short-Form Merger occurs, all remaining Shares will be canceled and the holders thereof will receive $30 in cash plus the CCP for each Share, except for Shares held by any stockholder that elects to assert statutory appraisal rights under Delaware law. Pursuant to the Transaction Agreement, immediately and contingent upon the closing of the Offer, all but two of the current members of the CVR Board will resign and be replaced by an equal number of directors designated by IEP Energy. Effective upon the earlier of the completion of the Subsequent Offering Period and the Short-Form Merger, the remaining two directors will resign from the Board and be replaced by two directors designated by IEP Energy. Promptly following the consummation of the Offer, for a period of 60 days, CVR will solicit proposals or offers from third parties to acquire CVR (the “Marketing Period”). If a proposal to acquire CVR for all-cash consideration equal to or exceeding $35 per Share is made within the Marketing Period (subject to certain adjustments and qualifications set forth in the Transaction Agreement), the IEP Parties have agreed to support the proposal, including by voting for or consenting to the proposal if it is submitted to the stockholders of CVR for their vote or consent. Any holder of CCPs will be entitled to any value realized in excess of $30 per Share, net of any investment banking fees, subject to the terms of the CCPs. The obligation of IEP Energy to accept for payment and pay for Shares tendered in the Offer is subject to certain conditions, including, among other things: the absence of a CVR Material Adverse Effect (as defined in the terms of the Offer); the absence of an injunction relating to the Offer; IEP Energy becoming aware of material misstatements or omissions in CVR's SEC reports; CVR not making any non-ordinary course material enhancements to executive compensation; CVR not making any non-ordinary course acquisitions or dispositions of assets (including completing the previously announced sale of a portion of CVR's stake in CVR Partners, LP); CVR not entering into any agreement for a merger, consolidation, business combination or reorganization transaction; and the taking of any actions by CVR intended to cause the failure of a condition to the Offer, except for the Minimum Condition. There can be no assurance that the acquisition of CVR will be consummated on the terms contemplated or at all. In addition, there can be no assurance that if the acquisition of CVR is consummated that we will receive transaction proposals during the Marketing Period. Distribution On April 30, 2012, the board of directors declared a quarterly distribution of $0.35 per depositary unit, comprised of a combination of $0.10 payable in cash and $0.25 payable in depositary units. The distribution is payable on May 31, 2012 to depositary unitholders of record at the close of business on May 16, 2012. We calculated the depositary units to be distributed based on the 20 trading-day volume weighted-average price of our depositary units ended on April 27, 2012, resulting in 0.005357 of a unit to be distributed per depositary unit. To the extent that the aggregate units to be distributed to any holder include a fraction of a unit, that fractional unit will be settled in cash. The cut-off date for brokers or nominees to advise our transfer agent, Registrar and Transfer Company, of their full and fractional unit requirements is May 22, 2012.

Subsequent Events.

CVR Energy Inc.

On April 18, 2012, IEP Energy LLC (“IEP Energy”), an indirect subsidiary of Icahn Enterprises, and certain affiliates of ours (collectively with IEP Energy, the “IEP Parties”), entered into a Transaction Agreement (the “Transaction Agreement”) with CVR Energy, Inc. (“CVR”). Pursuant to the Transaction Agreement, on April 23, 2012, IEP Energy amended its pending tender offer (the “Offer”) to purchase all of the issued and outstanding shares of CVR's common stock (the “Shares”) for a price of $30 per Share in cash plus one non-transferable contingent cash payment right for each Share (the “CCP”), which represents the contractual right to receive an additional cash payment per Share if a definitive agreement for the sale of CVR is executed within 15 months following the expiration of the Offer and such transaction closes. The Offer, as amended, will expire at 11:59 p.m., New York City time, on May 4, 2012 (the “Expiration Date”).

The Offer is conditioned upon there being validly tendered and not properly withdrawn, as of immediately prior to 11:59 p.m. on the Expiration Date, at least 31,661,040 Shares, which when added to the Shares already owned by IEP Energy and its affiliates, represents a majority of the Shares (the “Minimum Condition”). The Transaction Agreement provides that if the Minimum Condition is not satisfied as of immediately prior to 11:59 p.m. on the Expiration Date, and CVR has complied in all material respects with its obligations under the Transaction Agreement, the IEP Parties must immediately terminate the Offer and discontinue their previously announced intention to replace all nine directors on CVR's board of directors (the “Board”) at CVR's 2012 annual meeting of stockholders (the “CVR 2012 Annual Meeting”) and not present any other proposal for consideration at the CVR 2012 Annual Meeting.

If, following the closing of the Offer, the Minimum Condition is satisfied but IEP Energy holds less than 90% of the outstanding Shares, the Transaction Agreement requires IEP Energy to provide for a ten-business-day subsequent offering period during which stockholders who did not previously tender will have a second opportunity to tender their Shares for the same consideration of $30 per Share plus the CCP (the “Subsequent Offering Period”). If, following the closing of the Offer or the Subsequent Offering Period, IEP Energy holds at least 90% of the outstanding Shares, IEP Energy is required to cause a short-form merger of CVR under Section 253 of the Delaware General Corporation Law (the “Short-Form Merger”). If the Short-Form Merger occurs, all remaining Shares will be canceled and the holders thereof will receive $30 in cash plus the CCP for each Share, except for Shares held by any stockholder that elects to assert statutory appraisal rights under Delaware law.

Pursuant to the Transaction Agreement, immediately and contingent upon the closing of the Offer, all but two of the current members of the CVR Board will resign and be replaced by an equal number of directors designated by IEP Energy. Effective upon the earlier of the completion of the Subsequent Offering Period and the Short-Form Merger, the remaining two directors will resign from the Board and be replaced by two directors designated by IEP Energy.

Promptly following the consummation of the Offer, for a period of 60 days, CVR will solicit proposals or offers from third parties to acquire CVR (the “Marketing Period”). If a proposal to acquire CVR for all-cash consideration equal to or exceeding $35 per Share is made within the Marketing Period (subject to certain adjustments and qualifications set forth in the Transaction Agreement), the IEP Parties have agreed to support the proposal, including by voting for or consenting to the proposal if it is submitted to the stockholders of CVR for their vote or consent. Any holder of CCPs will be entitled to any value realized in excess of $30 per Share, net of any investment banking fees, subject to the terms of the CCPs.

The obligation of IEP Energy to accept for payment and pay for Shares tendered in the Offer is subject to certain conditions, including, among other things: the absence of a CVR Material Adverse Effect (as defined in the terms of the Offer); the absence of an injunction relating to the Offer; IEP Energy becoming aware of material misstatements or omissions in CVR's SEC reports; CVR not making any non-ordinary course material enhancements to executive compensation; CVR not making any non-ordinary course acquisitions or dispositions of assets (including completing the previously announced sale of a portion of CVR's stake in CVR Partners, LP); CVR not entering into any agreement for a merger, consolidation, business combination or reorganization transaction; and the taking of any actions by CVR intended to cause the failure of a condition to the Offer, except for the Minimum Condition.

There can be no assurance that the acquisition of CVR will be consummated on the terms contemplated or at all. In addition, there can be no assurance that if the acquisition of CVR is consummated that we will receive transaction proposals during the Marketing Period.

Distribution

On April 30, 2012, the board of directors declared a quarterly distribution of $0.35 per depositary unit, comprised of a combination of $0.10 payable in cash and $0.25 payable in depositary units. The distribution is payable on May 31, 2012 to depositary unitholders of record at the close of business on May 16, 2012. We calculated the depositary units to be distributed based on the 20 trading-day volume weighted-average price of our depositary units ended on April 27, 2012, resulting in 0.005357 of a unit to be distributed per depositary unit. To the extent that the aggregate units to be distributed to any holder include a fraction of a unit, that fractional unit will be settled in cash. The cut-off date for brokers or nominees to advise our transfer agent, Registrar and Transfer Company, of their full and fractional unit requirements is May 22, 2012.