Proposed Merger with Dow Chemical (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 11, 2015	Jun. 23, 2015	Dec. 31, 2014
Proposed Merger with Dow Chemical [Line Items]
Common stock, par value	$ 0.30	$ 0.30	$ 0.30	$ 0.30
DuPont to DowDuPont share exchange ratio		1.2820
Share of DowDuPont Common Stock		1
DowDuPont Common Stock share ownership		50.00%
Business Acquisition, Percentage of Voting Interests Acquired		50.00%
Time following termination of Merger Agreement for alternative transaction	12 months
Merger termination fee		$ 1,900
DowDuPont [Member]
Proposed Merger with Dow Chemical [Line Items]
Common stock, par value		$ 0.01
Dow [Member]
Proposed Merger with Dow Chemical [Line Items]
Common stock, par value		2.50
Preferred stock, par value		$ 1.00