XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.20.2

Summary of Significant Accounting Policies Summary of Accounting Policies (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Jun. 30, 2019
Reclassification of Divisional Equity to APIC |  | $ 0
Internal Reorganization [Member] |  |
Reclassification of Divisional Equity to APIC | $ 40 |

X
- Definition Amount of other increase (decrease) in additional paid in capital (APIC). + References No definition available. + Details
Name: | us-gaap_AdjustmentsToAdditionalPaidInCapitalOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=dd_InternalReorganizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |