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Commitments and Contingent Liabilities (Asset Retirement Obligations) (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
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Asset retirement obligation [Line Items] |  |
Asset retirement obligation liabilities | $ 49 | $ 52
Chemours [Member] |  |
Asset retirement obligation [Line Items] |  |
Indemnification assets | $ 41 |

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- Definition [Line Items] for Asset retirement obligation [Table] + References No definition available. + Details
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- Definition Indemnification asset for liabilities indemnified by Chemours against certain litigation, environmental, workers' compensation and other liabilities that arose prior to the spin-off of Chemours. + References No definition available. + Details
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- Definition The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Asset Retirement Obligation -URI http://asc.fasb.org/extlink&oid=6505190 + Details
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- Details
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