XML 46 R33.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Summary of Significant Accounting Policies (Narrative) (Details) - Accounting Standards Update 2016-09 [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2016
Summary of Significant Accounting Policies [Line Items] |  |  |
Excess tax benefits recognized | $ 5 | $ 25 |
Excess Tax Benefits [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Decrease in net cash used for operating activities and net cash provided by financing activities |  |  | $ 18
Employee Taxes Paid [Member] |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |
Decrease in net cash used for operating activities and net cash provided by financing activities |  |  | $ 25

X
- Definition Decrease in net cash used in operations and net cash provided by financing activities as a result of adoption of ASU 2016-09 + References No definition available. + Details
Name: | dd_Decreaseinnetcashusedinoperationsandnetcashprovidedbyfinancingactivities
Namespace Prefix: | dd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Excess tax benefits recognized in the provision for income taxes as a result of adoption of ASU 2016-09 + References No definition available. + Details
Name: | dd_Excesstaxbenefitsrecognized
Namespace Prefix: | dd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Line Items] for Summary of Significant Accounting Policies [Table] + References No definition available. + Details
Name: | dd_SummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | dd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=dd_AccountingStandardsUpdate201609Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dd_CashFlowPresentationAxis=dd_ExcessTaxBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dd_CashFlowPresentationAxis=dd_EmployeeTaxesPaidMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |