Danisco Acquisition (Details) (Danisco [Member]) In Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2011 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2011 DKK	Jun. 30, 2010 USD ($)	May 19, 2011 USD ($)
Business Acquisition [Line Items]
Public tender offer cash price per share					665
Increased Offer Price Per Share					700
Percentage of voting interests acquired	98.30%	98.30%		98.30%	98.30%		92.20%
Acquisition purchase price, amount per definitive agreement	$ 6,306	$ 6,306		$ 6,306
Expected purchase price, remaining outstanding shares	111	111		111
Percentage of outstanding shares acquired, excluding treasury shares	100.00%	100.00%		100.00%	100.00%
Danisco acquisition value	6,417	6,417		6,417
Net debt assumed	617	617		617
Transaction related costs		60		82
Business combination revenue of acquiree since acquisition date, actual	246
Business combination earnings or loss of acquiree since acquisition date, actual	(5)
Interest expense, debt, net of tax	10
Interest expense, debt, before tax	13
Business combination acquisition inventory step-up value portion expensed (after-tax)		31
Business combination acquisition inventory step-up value portion expensed (pre-tax)		43
Unaudited pro forma summary
Net sales		10,769	9,281	21,519		18,432
Net income attributable to DuPont		1,323	1,149	2,795		2,131
Fair value of assets acquired
Cash and cash equivalents							48
Accounts and notes receivable							519	[1]
Inventories							709	[2]
Property, plant and equipment							1,720
Goodwill							2,925	[3]
Other intangible assets							2,859	[4]
Other current and non-current assets							78
Total assets acquired							8,858
Fair value of liabilities assumed
Accounts payable and other accrued liabilities							433
Short-term borrowings							342
Long-term borrowings							323
Other liabilities							283
Deferred income taxes							1,060	[5]
Total liabilities assumed							2,441
Gross amount of accounts and notes receivable acquired							528
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 $528, 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 $43 was expensed to cost of goods sold and other operating charges in the second quarter 2011 and the remaining amount is expected to be expensed in the remainder of 2011.

[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. See Note 9 for further information regarding the allocation of goodwill by segment.

[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.