Danisco Acquisition (Details) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended		4 Months Ended	9 Months Ended
	Sep. 30, 2011 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2011 Danisco [Member] USD ($)	Sep. 30, 2010 Danisco [Member] USD ($)	Sep. 30, 2011 Danisco [Member] USD ($)	Sep. 30, 2011 Danisco [Member] USD ($)	Sep. 30, 2011 Danisco [Member] DKK	Sep. 30, 2010 Danisco [Member] USD ($)	May 19, 2011 Danisco [Member] USD ($)		May 19, 2011 Industrial Biosciences [Member] USD ($)	May 19, 2011 Nutrition and Health [Member] USD ($)
Business Acquisition [Line Items]
Public tender offer cash price per share							665
Increased Offer Price Per Share							700
Percentage of voting interests acquired									92.20%
Danisco acquisition value			$ 6,417		$ 6,417	$ 6,417
Net debt assumed			617		617	617
Transaction related costs			3			85
Business combination revenue of acquiree since acquisition date, actual					1,000
Business combination earnings or loss of acquiree since acquisition date, actual					(50)
Interest expense, debt, net of tax					20
Interest expense, debt, before tax					26
Business combination acquisition inventory step-up value portion expensed (after-tax)					125
Business combination acquisition inventory step-up value portion expensed (pre-tax)	132	175			175
Unaudited pro forma summary
Net sales			9,238	7,678		30,757		26,110
Net income attributable to DuPont			544	400		3,344		2,531
Fair value of assets acquired
Cash and cash equivalents									48
Accounts and notes receivable									522	[1]
Inventories									709	[2]
Property, plant and equipment									1,720
Goodwill									2,900	[3]	900	2,000
Other intangible assets									2,859	[4]
Other current and non-current assets									79
Total assets acquired									8,837
Fair value of liabilities assumed
Accounts payable and other accrued liabilities									482
Short-term borrowings									342
Long-term borrowings									323
Other liabilities									219
Deferred income taxes									1,054	[5]
Total liabilities assumed									2,420
Gross amount of accounts and notes receivable acquired									531
Expected uncollectible, accounts and notes receivable acquired									9
Inventory step-up									175
Indefinite lived intangible assets acquired									$ 1,002

[1] The gross amount of accounts and notes receivable acquired was $531, of which $9 was expected to be uncollectible.

[2] The fair value of inventories acquired included a step-up in the value of $175, of which $132 and $175 was expensed to cost of goods sold and other operating charges for the three and nine month periods ended September 30, 2011, respectively.

[3] Goodwill will not be deductible for statutory tax purposes. Goodwill is attributable to Danisco's workforce and the synergies in technology, operations and market access that are expected from the acquisition. Approximately $900 and $2,000 of goodwill was allocated to the Industrial Biosciences and Nutrition & Health segments, respectively.

[4] Other intangible assets acquired of $1,002 are indefinite-lived (see Note 9).

[5] The deferred income tax liabilities assumed represent the adjustments for the tax impact of fair value adjustments, primarily relating to definite-lived intangible assets.