Long-Term Employee Benefits (Schedules of Net Periodic Benefit Costs) (Details) (Other Long-Term Employee Benefit Plans Defined Benefit [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 37		$ 33		$ 29
Interest cost	174		212		238
Amortization of loss	94		60		58
Amortization of prior service (benefit) cost	(155)		(121)		(106)
Curtailment Loss	3		0		0
Net periodic benefit (credit) cost	153	[1]	184	[1]	219	[1]
Net (gain) / loss	60		437		94
Amortization of loss	(94)		(60)		(58)
Prior service (benefit) cost	(857)		11		(189)
Amortization of prior service benefit (cost)	155		121		106
Curtailment loss	(3)		0		0
Total (benefit) loss recognized in other comprehensive income	(739)		509		(47)
Accumulated Other Comprehensive Income Assumed From Purchase of Noncontrolling Interest	1		0		0
Total (benefit) loss recognized in other comprehensive income, attributable to DuPont	(738)		509		(47)
Total recognized in net periodic benefit cost and other comprehensive income	(585)		693		172
Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (credit) cost	$ 2		$ 2		$ 1

[1] The above amounts include net periodic benefit cost relating to discontinued operations for 2012, 2011 and 2010 of $2, $2 and $1, respectively.