Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 1,500	$ 1,444
Cumulative translation adjustment	170	44
Additions and revaluations of derivatives designated as cash flow hedges	(2)	8
Clearance of hedge results to earnings	(32)	27
Net revaluation and clearance of cash flow hedges to earnings	(34)	35
Net unrealized gain on securities	1	1
Other comprehensive income (loss), before tax	351	222
Income tax expense related to items of other comprehensive income	(64)	(62)
Other comprehensive income (loss), net of tax	287	160
Comprehensive income	1,787	1,604
Less: comprehensive income attributable to noncontrolling interests	14	12
Comprehensive income attributable to DuPont	1,773	1,592
Pension Plans [Member]
Net loss	(23)	0
Prior service cost	22	0
Amortization of prior service cost (benefit)	4	4
Amortization of loss	219	153
Benefit plans, net	222	157
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Amortization of prior service cost (benefit)	(30)	(30)
Amortization of loss	22	15
Benefit plans, net	$ (8)	$ (15)