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Commitments and Contingent Liabilities (Litigation) (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 3 Months Ended | 1 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2004 resident | Mar. 31, 2015 | Jul. 31, 2005 | Jan. 31, 2012
PFOA Matters [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Accrual balance |  | 14 us-gaap_LossContingencyAccrualAtCarryingValue / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PfoaMattersMember |  |
PFOA Matters: Drinking Water Actions [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Binding settlement agreement, class size | 80,000 dd_BindingSettlementAgreementClassSize / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PfoaMattersDrinkingWaterActionsMember |  |  |
Loss contingency, potential additional loss |  | 235 us-gaap_LossContingencyRangeOfPossibleLossMaximum / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PfoaMattersDrinkingWaterActionsMember |  |
Escrow deposit |  |  |  | 1 dd_EscrowAmountPerSettlementAgreement / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PfoaMattersDrinkingWaterActionsMember
PFOA Matters: Additional Actions [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Lawsuits alleging personal injury - Filed |  | 3,500 dd_LawsuitsallegingpersonalinjuryFiled / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PFOAMattersAdditionalActionsMember |  |
Lawsuits alleging personal injury, number of new claims filed |  | 600 us-gaap_LossContingencyNewClaimsFiledNumber / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PFOAMattersAdditionalActionsMember |  |
Lawsuits alleging wrongful death |  | 32 dd_LawsuitsAllegingWrongfulDeath / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PFOAMattersAdditionalActionsMember |  |
PFOA MDL plaintiffs |  | 6 dd_PFOAMDLplaintiffs / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PFOAMattersAdditionalActionsMember |  |
Payment for Plaintiffs Attorney Fees [Member] | PFOA Matters: Drinking Water Actions [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Settlement payments |  |  | 23 us-gaap_LossContingencyAccrualCarryingValuePayments / us-gaap_LitigationStatusAxis = dd_PaymentforPlaintiffsAttorneyFeesMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PfoaMattersDrinkingWaterActionsMember |
Payment to fund community health project [Member] | PFOA Matters: Drinking Water Actions [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Settlement payments |  |  | $ 70 us-gaap_LossContingencyAccrualCarryingValuePayments / us-gaap_LitigationStatusAxis = dd_PaymenttofundcommunityhealthprojectMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = dd_PfoaMattersDrinkingWaterActionsMember |

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- Definition Binding settlement agreement, class size + References No definition available. + Details
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- Definition Lawsuits alleging personal injury which have been filed. + References No definition available. + Details
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- Definition Lawsuits alleging wrongful death + References No definition available. + Details
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- Definition The Ohio federal court ("MDL") selected plaintiffs from which individual trials related to PFOA are scheduled. + References No definition available. + Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition Amount of payments made reducing loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
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- Definition The estimated maximum amount of possible loss from the contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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