Stock-Based Compensation RSU and PSU Activity Rollforward (Details) - Restricted Stock Units and Performance Deferred Stock Units [Member] - $ / shares shares in Thousands		4 Months Ended		8 Months Ended		12 Months Ended
		Dec. 31, 2017		Aug. 31, 2017		Dec. 31, 2016	Dec. 31, 2015
Predecessor [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Shares, Beginning of Period		3,078	[1]	3,390
Shares Granted during the Period				1,124
Shares Vested during the Period				(1,332)
Shares Forfeited during the Period				(104)
Nonvested Shares, End of Period				3,078	[1]	3,390
Weighted Average Grant Date Fair Value, Beginning of Period		$ 67.53		$ 63.11
Weighted Average Grant Date Fair Value, Granted during Period				76.41		$ 59.50	$ 71.66
Weighted Average Grant Date Fair Value, Vested during Period				63.08
Weighted Average Grant Date Fair Value, Forfeited during Period				70.69
Weighted Average Grant Date Fair Value, End of Period				$ 67.53		$ 63.11
Successor [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Shares, Beginning of Period	[1]	3,948
Shares Granted during the Period		412
Shares Vested during the Period		(139)
Shares Forfeited during the Period		(23)
Nonvested Shares, End of Period		4,198		3,948	[1]
Weighted Average Grant Date Fair Value, Beginning of Period		$ 67.06
Weighted Average Grant Date Fair Value, Granted during Period		70.02
Weighted Average Grant Date Fair Value, Vested during Period		67.67
Weighted Average Grant Date Fair Value, Forfeited during Period		66.65
Weighted Average Grant Date Fair Value, End of Period		$ 68.28		$ 67.06

[1] As a result of the Merger, all previous DuPont equity awards were converted into the right to receive 1.2820 shares of DowDuPont Common Stock, as discussed above. As a result, the number of shares outstanding at September 1, 2017 represents the shares as of August 31, 2017 multiplied by the conversion factor.