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Summary of Significant Accounting Policies Venezuelan Foreign Currency Translation (Details) (USD $) | Mar. 31, 2014
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Venezuelan BsF net monetary assets at CENCOEX rate | $ 70,000,000
Foreign exchange rate - Bolivar [Member] |
Official currency exchange rate in Venezuela | 6.3
Foreign exchange rate - SICAD 1 [Member] |
SICAD 1 Venezuelan foreign currency exchange rate | 10.7
Foreign exchange rate - SICAD 2 [Member] |
SICAD 2 Venezuelan foreign currency exchange rate | $ 50.85

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- Definition Official currency exchange rate in Venezuela set through the National Center for Foreign Commerce. + References No definition available. + Details
Name: | dd_OfficialcurrencyexchangerateinVenezuela
Namespace Prefix: | dd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition The SICAD 1 Venezuelan foreign currency exchange rate. + References No definition available. + Details
Name: | dd_SICAD1Venezuelanforeigncurrencyexchangerate
Namespace Prefix: | dd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition The SICAD 2 Venezuelan foreign currency exchange rate. + References No definition available. + Details
Name: | dd_SICAD2Venezuelanforeigncurrencyexchangerate
Namespace Prefix: | dd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition The Venezuelan BsF net monetary assets at the official CENCOEX rate. + References No definition available. + Details
Name: | dd_VenezuelanBsFnetmonetaryassetsatCENCOEXrate
Namespace Prefix: | dd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant