Long-Term Employee Benefits (Schedule of Fair Value of Pension Assets) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 16,656		$ 17,497
Fair value of plan assets excluding trust receivables and payables and assets measured at NAV		14,470		14,965
Pension trust receivables		264	[1]	783	[2]
Pension trust payables		(372)	[3]	(704)	[4]
DuPont securities held in plan assets		$ 732		$ 664
Percent of plan assets which are DuPont securities		4.00%		4.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 1,505		$ 1,962
U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4,071	[5]	3,873	[6]
Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,278		3,597
Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,067		2,028
Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,475		2,374
Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		721		831
Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1		1
Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		67		54
Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		275		246
Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		53		58
Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(47)		(59)
Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		9,997		10,580
Fair Value, Inputs, Level 1 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,480		1,961
Fair Value, Inputs, Level 1 [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4,033	[5]	3,843	[6]
Fair Value, Inputs, Level 1 [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		3,126		3,480
Fair Value, Inputs, Level 1 [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		864		852
Fair Value, Inputs, Level 1 [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		273		291
Fair Value, Inputs, Level 1 [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		39		44
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 Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		175		98
Fair Value, Inputs, Level 1 [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		7		10
Fair Value, Inputs, Level 1 [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		1
Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4,275		4,147
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		25		1
Fair Value, Inputs, Level 2 [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		20	[5]	10	[6]
Fair Value, Inputs, Level 2 [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		151		115
Fair Value, Inputs, Level 2 [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,203		1,176
Fair Value, Inputs, Level 2 [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,163		2,049
Fair Value, Inputs, Level 2 [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		682		786
Fair Value, Inputs, Level 2 [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1		1
Fair Value, Inputs, Level 2 [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		25		17
Fair Value, Inputs, Level 2 [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2		4
Fair Value, Inputs, Level 2 [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		46		48
Fair Value, Inputs, Level 2 [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		(47)		(60)
Fair Value, Inputs, Level 2 [Member] | Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		4
Fair Value, Inputs, Level 3 Inputs [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		198		238
Fair Value, Inputs, Level 3 Inputs [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Fair Value, Inputs, Level 3 Inputs [Member] | U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		18	[5]	20	[6]
Fair Value, Inputs, Level 3 Inputs [Member] | Non-U.S. Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1		2
Fair Value, Inputs, Level 3 Inputs [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Fair Value, Inputs, Level 3 Inputs [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		39		34
Fair Value, Inputs, Level 3 Inputs [Member] | Debt - Asset-backed [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		1
Fair Value, Inputs, Level 3 Inputs [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Fair Value, Inputs, Level 3 Inputs [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		42		37
Fair Value, Inputs, Level 3 Inputs [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		98		144
Fair Value, Inputs, Level 3 Inputs [Member] | Derivatives - Asset Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Fair Value, Inputs, Level 3 Inputs [Member] | Derivatives - Liability Position [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		0
Fair Value, Inputs, Level 3 Inputs [Member] | Other Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0
Investments Measured at Net Asset Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		2,294		2,453
Investments Measured at Net Asset Value [Member] | Debt - government issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		8
Investments Measured at Net Asset Value [Member] | Debt - corporate issued [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0		6
Investments Measured at Net Asset Value [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[7]	434		429
Investments Measured at Net Asset Value [Member] | Private market securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[8]	1,416		1,553
Investments Measured at Net Asset Value [Member] | Real Estate Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[8]	$ 444		$ 457

[1] Primarily receivables for investment securities sold.

[2] Primarily receivables for investment securities sold.

[3] Primarily payables for investment securities purchased.

[4] Primarily payables for investment securities purchased.

[5] The company's pension plans directly held $732 (4 percent of total plan assets) of DuPont common stock at December 31, 2016.

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

[7] Less than 5 percent of hedge funds have gates in place at the investor level for year end redemptions. Hedge funds also contain either no lock up or a lock up period of less than 1 year.

[8] The remaining life of private market securities and real estate funds is an average of 15 years per investment.