Long-Term Employee Benefits (Schedule of Fair Value of Pension Assets) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 17,497	$ 20,446
Fair value of plan assets excluding trust receivables and payables		17,418	20,786
Pension trust receivables	[1]	783	413
Pension trust payables	[2]	(704)	(753)
DuPont securities held in plan assets		$ 664	$ 737
Percent of plan assets which are DuPont securities		4.00%	4.00%
Pension asset fair value hierarchy revision			$ 566
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 1,962	2,310
U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	3,873	4,610
Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,597	4,436
Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,036	2,649
Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,380	2,600
Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		831	914
Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		430	445
Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,607	1,730
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		703	1,065
Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		58	106
Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(59)	(79)
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		10,580	12,178
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,961	2,310	[4]
Fair Value, Inputs, Level 1 [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	3,843	4,566	[4]
Fair Value, Inputs, Level 1 [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,480	3,813	[4]
Fair Value, Inputs, Level 1 [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		852	990	[4]
Fair Value, Inputs, Level 1 [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		291	370	[4]
Fair Value, Inputs, Level 1 [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		44	46	[4]
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		98	76
Fair Value, Inputs, Level 1 [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		10	7	[4]
Fair Value, Inputs, Level 1 [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	0	[4]
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4,161	5,409
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	0
Fair Value, Inputs, Level 2 [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	10	15	[4]
Fair Value, Inputs, Level 2 [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		115	619	[4],[5]
Fair Value, Inputs, Level 2 [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,184	1,659	[4]
Fair Value, Inputs, Level 2 [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,055	2,215	[4]
Fair Value, Inputs, Level 2 [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		786	867	[4]
Fair Value, Inputs, Level 2 [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	0
Fair Value, Inputs, Level 2 [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		17	11
Fair Value, Inputs, Level 2 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4	3
Fair Value, Inputs, Level 2 [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		48	99
Fair Value, Inputs, Level 2 [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(60)	(79)	[4]
Level 3 Inputs [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,677	3,199
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	[3]	20	29
Level 3 Inputs [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2	4
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		34	15
Level 3 Inputs [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1	1
Level 3 Inputs [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		429	445
Level 3 Inputs [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,590	1,719	[5]
Level 3 Inputs [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		601	986
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
Performance Chemicals [Member] | Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			109
Performance Chemicals [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			$ 1,090

[1] Primarily receivables for investment securities sold.

[2] Primarily payables for investment securities purchased.

[3] The company's pension plans directly held $664 (4 percent of total plan assets) and $737 (4 percent of total plan assets) of DuPont common stock at December 31, 2015 and 2014, respectively.

[4] The company's pension assets by fair value hierarchy table at December 31, 2014 included approximately $109 of Level 1 assets and $1,090 of Level 2 assets that were transferred to Chemours upon completion of the spin-off transaction.

[5] The company’s pension assets by fair value hierarchy table at December 31, 2014 have been revised for the following correction: increase in Level 2 - Non-U.S. Equity Securities of $566 with a corresponding reduction in Level 3 - Private Market Securities.