Long-Term Employee Benefits (Schedules of Net Periodic Benefit Costs) (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
Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated other comprehensive income assumed from purchase of noncontrolling interest	0		0		1
Total loss (benefit) recognized in other comprehensive income, attributable to DuPont	387		(452)		(738)
Total recognized in net periodic benefit cost and other comprehensive income	368		(565)		(585)
Net Periodic Benefit (Credit) Cost [Member] | Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	17		29		37
Interest cost	121		130		174
Amortization of loss	57		76		94
Amortization of prior service (benefit) cost	(214)		(195)		(155)
Curtailment loss (gain)	0		(154)		(3)
Settlement loss	0		1		0
Net periodic benefit (credit) cost	(19)	[1]	(113)	[1]	153	[1]
Discontinued Operations [Member] | Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (credit) cost	0		0		2
Changes in Plan Assets and Benefit Obligations Recognized in OCI [Member] | Other Long-Term Employee Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net loss (gain)	280		(513)		60
Amortization of loss	(57)		(76)		(94)
Prior service benefit	(50)		(211)		(857)
Amortization of prior service benefit (cost)	214		195		155
Curtailment (loss) gain	0		154		3
Settlement loss	0		1		0
Total loss (benefit) recognized in other comprehensive income	$ 387		$ (452)		$ (739)

[1] The above amounts include net periodic benefit cost relating to discontinued operations for 2014, 2013 and 2012 of $0, $0 and $2, respectively.