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Short-Term Borrowings, Long-Term Debt and Available Credit Facilities Uncommitted Credit Facilities and Outstanding Letters of Credit (Details) $ in Millions	Jun. 30, 2019 USD ($)
Line of Credit Facility [Line Items]
Line Of Credit Facility, Remaining Borrowing Capacity, Uncommitted Amount	$ 378
Letters of Credit Outstanding, Amount	$ 98

X

- Definition

Line Of Credit Facility, Remaining Borrowing Capacity, Uncommitted Amount

+ References

No definition available.

+ Details

Name:	dd_LineOfCreditFacilityRemainingBorrowingCapacityUncommittedAmount
Namespace Prefix:	dd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

X

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