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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.

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- Definition The amount of employer securities or securities of parties related to the employer that are included in plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (n) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
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