Consolidated Income Statements (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Net sales	$ 9,172us-gaap_SalesRevenueNet	$ 10,128us-gaap_SalesRevenueNet
Other income, net	198dd_OtherIncomeNet	17dd_OtherIncomeNet
Total	9,370dd_TotalNetSalesAndOtherIncomeNet	10,145dd_TotalNetSalesAndOtherIncomeNet
Cost of goods sold	5,553us-gaap_CostOfGoodsSold	6,000us-gaap_CostOfGoodsSold
Other operating charges	283us-gaap_OtherCostAndExpenseOperating	286us-gaap_OtherCostAndExpenseOperating
Selling, general and administrative expenses	1,312	1,436
Research and development expense	499us-gaap_ResearchAndDevelopmentExpense	518us-gaap_ResearchAndDevelopmentExpense
Interest expense	84us-gaap_InterestExpenseDebt	103us-gaap_InterestExpenseDebt
Employee separation / asset related charges, net	38	0
Total	7,769us-gaap_CostsAndExpenses	8,343us-gaap_CostsAndExpenses
Income before income taxes	1,601	1,802
Provision for income taxes	566us-gaap_IncomeTaxExpenseBenefit	357us-gaap_IncomeTaxExpenseBenefit
Net income	1,035us-gaap_ProfitLoss	1,445us-gaap_ProfitLoss
Less: Net income attributable to noncontrolling interests	4	6
Net income attributable to DuPont	$ 1,031us-gaap_NetIncomeLoss	$ 1,439us-gaap_NetIncomeLoss
Basic earnings per share of common stock	$ 1.13us-gaap_EarningsPerShareBasic	$ 1.56us-gaap_EarningsPerShareBasic
Diluted earnings per share of common stock	$ 1.13us-gaap_EarningsPerShareDiluted	$ 1.54us-gaap_EarningsPerShareDiluted
Dividends per share of common stock	$ 0.47	$ 0.45

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