Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$ 2,813	$ 3,510	$ 3,052
Cumulative translation adjustment	77	(457)	(6)
Additions and revaluations of derivatives designated as cash flow hedges	8	10	(33)
Clearance of hedge results to earnings	(65)	96	90
Net revaluation and clearance of cash flow hedges to earnings	(57)	106	57
Net unrealized (loss) gain on securities	(2)	2	2
Other comprehensive income (loss), before tax	253	(4,300)	(12)
Income tax expense related to items of other comprehensive income	(121)	1,322	(5)
Other comprehensive income (loss), net of tax	132	(2,978)	(17)
Comprehensive income	2,945	532	3,035
Less: comprehensive income attributable to noncontrolling interests	53	18	23
Comprehensive income attributable to DuPont	2,892	514	3,012
Pension Plans, Defined Benefit [Member]
Net loss	(1,433)	(4,069)	(635)
Prior service benefit (cost)	22	(2)	0
Amortization of prior service cost (benefit)	13	16	16
Amortization of loss	887	613	507
Curtailment / settlement loss	7	0	0
Benefit plans, net	(504)	(3,442)	(112)
Other Long-Term Employee Benefit Plans Defined Benefit [Member]
Net loss	(60)	(437)	(94)
Prior service benefit (cost)	857	(11)	189
Amortization of prior service cost (benefit)	(155)	(121)	(106)
Amortization of loss	94	60	58
Curtailment / settlement loss	3	0	0
Benefit plans, net	$ 739	$ (509)	$ 47