Quaterly Financial Data Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		2 Months Ended		3 Months Ended														4 Months Ended	8 Months Ended	12 Months Ended
	Sep. 30, 2017		Aug. 31, 2017		Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2018	Dec. 31, 2016
Predecessor [Member]
Effect of Fourth Quarter Events [Line Items]
Net Sales			$ 2,991												$ 6,971		$ 7,319			$ 17,281		$ 23,209
Cost of Goods Sold			1,937												3,963		4,152			10,052		13,937
Restructuring and Asset Related Charges - Net			11	[1]											160	[1]	152	[1]		323		556
Integration and Separation Costs			210												201		170			581		386
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest			(258)												722		1,178	[2],[3]		1,642		2,082
Goodwill Impairment Charge																				0		0
Net (loss) income from continuing operations			(229)	[4]											869	[4]	1,121	[4]		1,761		2,525
Net Income (Loss) Attributable to DuPont			$ (234)												$ 862		$ 1,113			$ 1,741		$ 2,513
Earnings per common share, continuing operations - basic			$ (0.30)	[5]											$ 0.82	[5]	$ 1.35	[5]		$ 1.86		$ 2.36
Earnings per common share, continuing operations - diluted			$ (0.30)	[5]											$ 0.82	[5]	$ 1.34	[5]		$ 1.85		$ 2.35
Successor [Member]
Effect of Fourth Quarter Events [Line Items]
Net Sales	$ 1,735				$ 5,741		$ 5,294		$ 8,545		$ 6,699		$ 5,318						$ 7,053		$ 26,279
Cost of Goods Sold	1,531	[6]			3,980	[6]	3,686	[6]	5,669	[6]	4,847	[6]	4,709	[6]					6,240		18,182
Restructuring and Asset Related Charges - Net	40	[1]			115	[1]	182	[1]	91	[1]	97	[1]	140	[1]					180		485
Integration and Separation Costs	71	[7]			449		344		327		255		243	[7]					314		1,375
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	(275)				(351)	[8],[9]	(4,960)	[9],[10]	514	[9]	(216)	[9]	1,362	[9]					1,087		(5,013)
Goodwill Impairment Charge							4,503	[11]											0		4,503
Net (loss) income from continuing operations	(295)	[4]			(351)		(4,960)		514		(221)	[12]	1,305	[4]					1,010		(5,018)
Net Income (Loss) Attributable to DuPont	$ (293)				$ (354)		$ (4,960)		$ 513		$ (228)		$ 1,303						$ 1,010		$ (5,029)

[1] See Note 6 for additional information.

[2] First quarter 2017 included a gain of $162 million recorded in sundry income - net associated with the sale of the company's global food safety diagnostic business. See Note 4 for additional information.

[3] First quarter 2017 included a tax benefit of $53 million, as well as a $47 million benefit on associated accrued interest reversals (recorded in sundry income (expense) - net), related to a reduction in the company’s unrecognized tax benefits due to the closure of various tax statutes of limitations.

[4] Includes income (loss) from discontinued operations after taxes primarily related to the Divested Ag Business of $160 million, $137 million, $29 million, $(20) million, and $(57) million, in the first quarter 2017, second quarter 2017, the period July 1 - August 31, 2017, the period September 1 - September 30, 2017, and fourth quarter 2017, respectively. Additionally, includes income (loss) from discontinued operations after taxes primarily related to Chemours of $(217) million and $10 million, in the first quarter 2017 and second quarter 2017, respectively. See Note 4 for additional information.

[5] Due to quarterly changes in the share count and the allocation of income to participating securities, the sum of the four quarters may not equal the earningsper share amount calculated for the year.

[6] Includes charges of $(360) million and $(1,109) million, $(703) million, $(682) million, $(109) million, and $(134) million during the period September 1 - September 30, 2017, fourth quarter 2017, first quarter 2018, second quarter 2018, third quarter 2018, and fourth quarter 2018, respectively, related to the amortization of inventory step-up as a result of the Merger and the acquisition of the H&N Business. See Note 3 for additional information.

[7] Integration and separation costs were $170 million, $201 million, and $210 million in the first quarter 2017, second quarter 2017, and the period July 1 - August 31, 2017, respectively. In the Predecessor periods, costs are recorded in selling, general and administrative expenses. See Note 3 for additional information.

[8] Includes a loss on early extinguishment of debt of $(81) million in the fourth quarter 2018 related to the retirement of some of the company's notes payable. See Note 15 for additional information.

[9] Includes a tax benefit of $2,262 million in the fourth quarter 2017 related to The Act and a benefit related to an internal entity restructuring associated with the Intended Business Separations. Includes tax (charges) benefits of $(102) million, $(7) million, $46 million, and $(167) million in the first quarter 2018, second quarter 2018, third quarter 2018, and fourth quarter 2018, respectively, related to The Act. See Note 9 for additional information.

[10] Includes a tax charge of $(75) million in the third quarter 2018 related to the establishment of a full valuation allowance against the net deferred tax asset position of a legal entity in Brazil. See Note 9 for additional information.

[11] See Note 14 for additional information

[12] Includes loss from discontinued operations after taxes related to the Divested Ag Business of $(5) million in the first quarter 2018. See Note 4 for additional information.