Long-Term Employee Benefits (Schedule of Fair Value of Pension Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 20,614		$ 19,399
Fair value of plan assets excluding trust receivables and payables	20,884		19,797
Pension trust receivables	200	[1]	312	[1]
Pension trust payables	(470)	[2]	(710)	[2]
DuPont securities held in plan assets	648		449
Percent of plan assets which are DuPont securities	3.00%		2.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,076		2,613
U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,432	[3]	3,647	[3]
Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,005		3,928
Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,970		1,714
Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,961		2,236
Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	925		1,059
Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	435		389
Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,882		2,926
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,179		1,236
Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	97		129
Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(78)		(80)
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	12,328		10,978
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,073		2,584
Fair Value, Inputs, Level 1 [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,383	[3]	3,604	[3]
Fair Value, Inputs, Level 1 [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,965		3,842
Fair Value, Inputs, Level 1 [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	396		443
Fair Value, Inputs, Level 1 [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	376		378
Fair Value, Inputs, Level 1 [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51		40
Fair Value, Inputs, Level 1 [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Fair Value, Inputs, Level 1 [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Fair Value, Inputs, Level 1 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	73		82
Fair Value, Inputs, Level 1 [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	18		6
Fair Value, Inputs, Level 1 [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(7)		(1)
Level 2 Inputs [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,086		4,309
Level 2 Inputs [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3		29
Level 2 Inputs [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	22	[3]	25	[3]
Level 2 Inputs [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	37		86
Level 2 Inputs [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,574		1,271
Level 2 Inputs [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,566		1,831
Level 2 Inputs [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	870		1,017
Level 2 Inputs [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1		2
Level 2 Inputs [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5		4
Level 2 Inputs [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Level 2 Inputs [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	79		123
Level 2 Inputs [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	(71)		(79)
Level 3 Inputs [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,470		4,510
Level 3 Inputs [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Level 3 Inputs [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	[3]	18	[3]
Level 3 Inputs [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3		0
Level 3 Inputs [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Level 3 Inputs [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19		27
Level 3 Inputs [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4		2
Level 3 Inputs [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	434		387
Level 3 Inputs [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,877		2,922
Level 3 Inputs [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,106		1,154
Level 3 Inputs [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0		0
Level 3 Inputs [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0		$ 0

[1] Primarily receivables for investment securities sold.

[2] Primarily payables for investment securities purchased.

[3] The company's pension plans directly held $648 (3 percent of total plan assets) and $449 (2 percent of total plan assets) of DuPont common stock at December 31, 2013 and 2012, respectively.