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, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Predecessor [Member]
Effect of Fourth Quarter Events [Line Items]
Net Sales			$ 2,991				$ 6,971		$ 7,319		$ 4,903		$ 4,646		$ 6,646		$ 7,014			$ 17,281	$ 23,209	$ 23,657
Cost of Goods Sold			1,975				4,021		4,209		3,032		2,997		3,823		4,103			10,205	13,955	14,591
Restructuring and Asset Related Charges - Net			11	[1]			160	[1]	152	[1]	394	[1]	172	[1]	(88)	[1]	78	[1]		323	556	795
Net income (loss)			(229)	[2]			869	[2]	1,121	[2],[3],[4]	263	[5]	6	[5]	1,024	[5]	1,232	[5],[6]		1,761	2,525	1,959
Net Income (Loss) Attributable to DuPont			$ (234)				$ 862		$ 1,113		$ 265		$ 2		$ 1,020		$ 1,226			$ 1,741	$ 2,513	$ 1,953
Earnings per common share, continuing operations - basic			$ (0.30)	[7]			$ 0.82	[7]	$ 1.35	[7]	$ 0.19	[7]	$ (0.08)	[7]	$ 1.03	[7]	$ 1.23	[7]		$ 1.86	$ 2.36	$ 1.60
Earnings per common share, continuing operations - diluted			$ (0.30)	[7]			$ 0.82	[7]	$ 1.34	[7]	$ 0.19	[7]	$ (0.08)	[7]	$ 1.02	[7]	$ 1.22	[7]		$ 1.85	$ 2.35	$ 1.59
Successor [Member]
Effect of Fourth Quarter Events [Line Items]
Net Sales	$ 1,735				$ 5,318														$ 7,053
Cost of Goods Sold	1,511	[8]			4,654	[8]													6,165
Restructuring and Asset Related Charges - Net	40	[1]			140	[1]													180
Net income (loss)	(295)	[2],[8]			1,305	[2],[8],[9]													1,010
Net Income (Loss) Attributable to DuPont	$ (293)				$ 1,303														$ 1,010

[1] See Note 5 for additional information.

[2] Includes charges of $(170) million, $(201) million, $(210) million, $(71) million, and $(243) million in the first quarter 2017, second quarter 2017, the period July 1 - August 31, 2017, the period September 1 - September 30, 2017, and the fourth quarter 2017, respectively, related to transaction costs associated with the Merger. Predecessor costs are recorded in selling, general and administrative expenses; Successor costs are recoded in integration and separation costs. See Note 3 for additional information.

[3] 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.

[4] 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 - net), related to a reduction in the company’s unrecognized tax benefits due to the closure of various tax statutes of limitations.

[5] First, second, third and fourth quarter 2016 included charges of $(24) million, $(76) million, $(122) million, and $(164) million, respectively, recorded in selling, general and administrative expenses related to transaction costs associated with the Merger. See Note 3 for additional information.

[6] First quarter 2016 included a gain of $369 million recorded in sundry income - net associated with the sale of the DuPont (Shenzhen) Manufacturing Limited entity, which held certain buildings and other assets. See Note 4 for additional information

[7] 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 earnings per share amount calculated for the year.

[8] Includes charges of $(360) million and $(1,109) million during the period September 1 - September 30, 2017 and the fourth quarter 2017, respectively, related to the amortization of inventory step-up as a result of the Merger and the acquisition of the H&N Business, which was included in cost of goods sold. See Note 3 for additional information.

[9] Includes a tax benefit of $2,262 million in the fourth quarter 2017 related to the Tax Cuts and Jobs Act and a benefit related to an internal entity restructuring associated with the Intended Business Separations. See Note 7 for additional information.