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Commitments and Contingencies (Details) - USD ($) $ in Millions	Sep. 30, 2015	Aug. 28, 2015	Aug. 07, 2015	Aug. 09, 2014	May. 02, 2012
Nui Phao Mining Company
Loss Contingencies [Line Items]
Damages sought	$ 167.0
Freeport-McMoran Breach of Contract (Invoices)
Loss Contingencies [Line Items]
Damages sought			$ 58.0
Freeport-McMoran
Loss Contingencies [Line Items]
Damages sought		$ 116.0
Damages entitled to			$ 71.0
Judicial Council Of California - Unpaid Fees
Loss Contingencies [Line Items]
Litigation amount					$ 4.7
Judicial Council Of California, Disgorged Fees
Loss Contingencies [Line Items]
Litigation amount					$ 18.3
Pending Litigation | Motiva vs. Bechtel-Jacobs CEP Port Arthur Joint Venture
Loss Contingencies [Line Items]
Damages sought				$ 7,000.0

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- Definition

The amount or range of possible amounts of gain that could be realized upon the resolution of a contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 30
-Section 50
-Paragraph 1
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- Definition

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+ References

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+ References

No definition available.

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- Definition

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
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