Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 1,188	$ 1,229	$ 2,688	$ 2,673
Cumulative translation adjustment	(412)	73	(242)	117
Additions and revaluations of derivatives designated as cash flow hedges	38	(5)	36	3
Clearance of hedge results to earnings	(23)	25	(55)	52
Net revaluation and clearance of cash flow hedges to earnings	15	20	(19)	55
Net unrealized gain (loss) on securities	1	(1)	2	0
Other comprehensive income (loss), before tax	(177)	228	174	450
Income tax expense related to items of other comprehensive income	(76)	(54)	(140)	(116)
Other comprehensive income (loss), net of tax	(253)	174	34	334
Comprehensive income	935	1,403	2,722	3,007
Less: comprehensive income attributable to noncontrolling interests	34	9	48	21
Comprehensive income attributable to DuPont	901	1,394	2,674	2,986
Pension Plans [Member]
Net (loss) gain	4	(3)	(19)	(3)
Prior service cost	0	(2)	22	(2)
Amortization of prior service cost (benefit)	3	4	7	8
Amortization of loss	220	153	439	306
Benefit plans, net	227	152	449	309
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Amortization of prior service cost (benefit)	(30)	(31)	(60)	(61)
Amortization of loss	22	15	44	30
Benefit plans, net	$ (8)	$ (16)	$ (16)	$ (31)