Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost of Pension Benefits) (Details) (Pension 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]
Total recognized in net periodic benefit cost and other comprehensive income	$ 1,360		$ 4,087		$ 668
Net Periodic Benefit (Credit) Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	277		249		207
Interest cost	1,165		1,253		1,262
Expected return on plan assets	(1,517)		(1,475)		(1,435)
Amortization of loss	887		613		507
Amortization of prior service (benefit) cost	13		16		16
Curtailment/settlement loss	7		0		0
Net periodic benefit (credit) cost	832	[1]	656	[1]	557	[1]
Discontinued Operations [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (credit) cost	42		41		38
Changes in Plan Assets and Benefit Obligations Recognized [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain)	1,433		4,069		635
Amortization of loss	(887)		(613)		(507)
Prior service (benefit) cost	(22)		2		0
Amortization of prior service benefit (cost)	(13)		(16)		(16)
Curtailment/settlement loss	(7)		0		0
Total (benefit) loss recognized in other comprehensive income	504		3,442		112
Noncontrolling Interest	(1)		(11)		(1)
Accumulated Other Comprehensive Income Assumed From Purchase of Noncontrolling Interest	25		0		0
Total (benefit) loss recognized in other comprehensive income, attributable to DuPont	$ 528		$ 3,431		$ 111

[1] The above amounts include net periodic benefit cost relating to discontinued operations for 2012, 2011 and 2010 of $42, $41 and $38, respectively.