Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 13	$ 460	$ 2,701	$ 3,133
Cumulative translation adjustment	189	(348)	(53)	(231)
Additions and revaluations of derivatives designated as cash flow hedges	(6)	11	30	14
Clearance of hedge results to earnings	(11)	25	(66)	77
Net revaluation and clearance of cash flow hedges to earnings	(17)	36	(36)	91
Net unrealized gain (loss) on securities	(5)	0	(3)	0
Other comprehensive income (loss), before tax	484	(170)	658	280
Income tax expense related to items of other comprehensive income	(126)	(63)	(266)	(179)
Other comprehensive income (loss), net of tax	358	(233)	392	101
Comprehensive income	371	227	3,093	3,234
Less: comprehensive income attributable to noncontrolling interests	3	3	51	24
Comprehensive income attributable to DuPont	368	224	3,042	3,210
Pension Plans [Member]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	(609)	0	(628)	(3)
Prior service cost	0	0	22	(2)
Amortization of prior service cost (benefit)	3	4	10	12
Amortization of loss	222	153	661	459
Curtailment	2	0	2	0
Benefit plans, net	(382)	157	67	466
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	(141)	0	(141)	0
Prior service cost	857	0	857	0
Amortization of prior service cost (benefit)	(44)	(30)	(104)	(91)
Amortization of loss	24	15	68	45
Curtailment	3	0	3	0
Benefit plans, net	$ 699	$ (15)	$ 683	$ (46)