Business Combinations (Tables) - Merger with Dow [Member]

9 Months Ended

Sep. 30, 2018

Business Acquisition [Line Items]

Schedule of Business Acquisitions, by Acquisition

(In millions, except exchange ratio)
DuPont Common Stock outstanding as of the Merger Effectiveness Time	868.3
DuPont exchange ratio	1.2820
DowDuPont Common Stock issued in exchange for DuPont Common Stock	1,113.2
Fair value of DowDuPont Common Stock issued 1	$	74,195
Fair value of DowDuPont equity awards issued in exchange for outstanding DuPont equity awards 2	485
Total consideration	$	74,680

1. Amount was determined based on the price per share of Dow Common Stock of $66.65 on August 31, 2017.

2. Represents the fair value of replacement awards issued for DuPont's equity awards outstanding immediately before the Merger and attributable to the service periods prior to the Merger. The previous DuPont equity awards were converted into the right to receive 1.2820 shares of DowDuPont Common Stock.

	Successor				Predecessor
(In millions)	Three Months Ended September 30, 2018		For the Period September 1 - September 30, 2017		For the Period July 1 - August 31, 2017
Integration and separation costs	$	344	$	71
Selling, general and administrative expenses					$	210

	Successor				Predecessor
(In millions)	Nine Months Ended September 30, 2018		For the Period September 1 - September 30, 2017		For the Period January 1 - August 31, 2017
Integration and separation costs	$	926	$	71
Selling, general and administrative expenses					$	581

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

	Final fair value
(In millions)
Fair Value of Assets as of the Merger Effectiveness Time
Cash and cash equivalents	$	4,005
Marketable securities	2,849
Accounts and notes receivable	7,834
Inventories	8,805
Other current assets	420
Investment in nonconsolidated affiliates	1,596
Assets held for sale - current	3,732
Property, plant and equipment	11,684
Goodwill	45,497
Other intangible assets	27,071
Deferred income tax assets	279
Other assets	2,066
Total Assets	$	115,838
Fair Value of Liabilities
Short-term borrowings and capital lease obligations	$	5,319
Accounts payable	3,298
Income taxes payable	261
Accrued and other current liabilities	3,517
Liabilities held for sale - current	125
Long-term debt	9,878
Deferred income tax liabilities	8,259
Pension and other post employment benefits - noncurrent	8,056
Other noncurrent obligations	1,967
Total Liabilities	$	40,680
Noncontrolling interests	239
Preferred stock	239
Fair Value of Net Assets (Consideration for the Merger)	$	74,680