XML 139 R105.htm IDEA: XBRL DOCUMENT v2.4.1.9
Long-Term Employee Benefits (Plan Assets) (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]    
Total 100.00%dd_DefinedBenefitPlanTargetAllocationPercentageOfAllAssets 100.00%dd_DefinedBenefitPlanTargetAllocationPercentageOfAllAssets
U.S. Equity Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average target plan asset allocations 28.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember		 27.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_EquitySecuritiesMember
Non-U.S. Equity Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average target plan asset allocations 21.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= dd_NonUSEquitySecuritiesMember		 21.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= dd_NonUSEquitySecuritiesMember
Fixed Income Securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average target plan asset allocations 32.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember		 33.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_FixedIncomeSecuritiesMember
Hedge Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average target plan asset allocations 2.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_HedgeFundsEquityMember		 2.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_HedgeFundsEquityMember
Private market securities [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average target plan asset allocations 9.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember		 10.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_PrivateEquityFundsMember
Real Estate [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average target plan asset allocations 5.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_RealEstateMember		 7.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_RealEstateMember
Cash and Cash Equivalents [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Weighted average target plan asset allocations 3.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember		 0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CashAndCashEquivalentsMember