Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost of Pension Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (credit) cost	$ 406		$ 953		$ 832
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Noncontrolling Interest	1		0		(1)
Accumulated other comprehensive income assumed from purchase of noncontrolling interest	0		0		25
Total loss (benefit) recognized in other comprehensive income, attributable to DuPont	3,474		(4,473)		528
Total recognized in net periodic benefit cost and other comprehensive income	3,880		(3,520)		1,360
Net Periodic Benefit (Credit) Cost [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	241		271		277
Interest cost	1,162		1,088		1,165
Expected return on plan assets	(1,611)		(1,524)		(1,517)
Amortization of loss	601		957		887
Amortization of prior service (benefit) cost	2		8		13
Curtailment loss	4		1		(2)
Settlement loss	7		152		5
Net periodic benefit (credit) cost	406	[1]	953	[1]	832	[1]
Discontinued Operations [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (credit) cost	0		3		42
Changes in Plan Assets and Benefit Obligations Recognized in OCI [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain)	4,131		(3,293)		1,433
Amortization of loss	(601)		(957)		(887)
Prior service benefit	(44)		(62)		(22)
Amortization of prior service benefit (cost)	(2)		(8)		(13)
Curtailment (loss) gain	(4)		(1)		2
Settlement loss	(7)		(152)		5
Total loss (benefit) recognized in other comprehensive income	$ 3,473		$ (4,473)		$ 504

[1] The above amounts include net periodic benefit cost relating to discontinued operations for 2014, 2013 and 2012 of $0, $3 and $42, respectively.