Defined Benefit Plan, Alternative Investment, Average Remaining Life

No definition available.

Name:	dd_DefinedBenefitPlanAlternativeInvestmentAverageRemainingLife
Namespace Prefix:	dd_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Defined Benefit Plan, Lock Up Period

+ References

No definition available.

+ Details

Name:	dd_DefinedBenefitPlanLockUpPeriod
Namespace Prefix:	dd_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Defined Benefit Plan, Percentage With Year End Redemptions

+ References

No definition available.

+ Details

Name:	dd_DefinedBenefitPlanPercentageWithYearEndRedemptions
Namespace Prefix:	dd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value of investment in certain entities that calculate net asset value per share. Includes, but is not limited to, by unit, membership interest, or other ownership interest. Investment includes, but is not limited to, investment in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds. Excludes measurement of net asset value as estimate of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=SL6742756-110258

+ Details

Name:	us-gaap_AlternativeInvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Notice period the entity is required to deliver before it can redeem an investment calculated using net asset value per share, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, investments calculated by per unit, per membership interest, other equity or ownership interest and alternative investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=SL6742756-110258

+ Details

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionNoticePeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=SL6742756-110258

+ Details

Name:	us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_HedgeFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_PrivateEquityFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_RealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_SuccessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_PredecessorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dd_RedemptionFrequencyAxis=dd_RedemptionFrequencyMonthlyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dd_RedemptionFrequencyAxis=dd_RedemptionFrequencyQuarterlyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Pension Plans and Other Post Employment Benefit Plans Net Asset Value as a Practical Expedient (Details) - Pension Plan - USD ($) $ in Millions	4 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of funds with gates in place for year-end redemptions (less than 5 percent)	5.00%
Lock Up Period	1 year
Private Market Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Average Remaining Life per Investment	15 years
Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Average Remaining Life per Investment	15 years
Successor [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value	$ 2,567
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	1,168
Successor [Member] \| Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value	747
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	0
Successor [Member] \| Private Market Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value	1,383
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	797
Successor [Member] \| Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value	437
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 371
Predecessor [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value		$ 2,294
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments		937
Predecessor [Member] \| Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value		434
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments		0
Predecessor [Member] \| Private Market Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value		1,416
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments		693
Predecessor [Member] \| Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Investments Measured at Net Asset Value		444
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments		$ 244
Redemption Frequency, Monthly [Member] \| Minimum [Member] \| Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period Range	15 days
Redemption Frequency, Monthly [Member] \| Maximum [Member] \| Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period Range	45 days
Redemption Frequency, Quarterly [Member] \| Minimum [Member] \| Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period Range	10 days
Redemption Frequency, Quarterly [Member] \| Maximum [Member] \| Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Redemption Notice Period Range	185 days