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Acquisitions (Unaudited) (Details) (USD $) | 6 Months Ended | 3 Months Ended |  |  | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 Plains Exploration & Production Company [Member] | Jun. 30, 2013 McMoRan Exploration Co [Member] | Mar. 31, 2013 Kokkola Cobalt Chemicals Refinery [Member] | Mar. 31, 2013 Senior Notes [Member] | Mar. 31, 2014 Senior Notes [Member] | Mar. 07, 2013 Senior Notes [Member] | Jun. 30, 2013 Bank Term Loan [Member] | Mar. 31, 2014 Bank Term Loan [Member] | Feb. 14, 2013 Bank Term Loan [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 6,500,000,000 | $ 6,500,000,000 |  | $ 4,000,000,000 | $ 4,000,000,000
Proceeds from Issuance of Long-term Debt |  |  |  | $ 6,400,000,000 |  |  |  |  |
Term of Debt Agreement |  |  |  |  |  |  | 5 years |  |
Business Acquisition, Effective Date of Acquisition | May 31, 2013 | Jun. 03, 2013 | Mar. 29, 2013 |  |  |  |  |  |

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