Consolidated Statements of Cash Flows - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended	13 Months Ended
	Sep. 30, 2017	Aug. 31, 2017	Sep. 30, 2018	Aug. 31, 2017	Sep. 30, 2018	Sep. 30, 2018
Cash used for operating activities
Goodwill Impairment Charge			$ 4,503		$ 4,503
Cash (used for) provided by financing activities
Cash, Cash Equivalents, and Restricted Cash, beginning of period					7,808
Cash, Cash Equivalents, and Restricted Cash, end of period			4,042		4,042	$ 4,042
Successor [Member]
Cash used for operating activities
Net (loss) income	$ (295)		(4,960)		(4,667)
Depreciation and Amortization	200				1,948
Provision for Deferred Income Tax	211				119
Net Periodic Pension (Benefit) Cost	(28)				(242)
Pension Contributions	(19)				(1,266)
Net gain on sales of property, businesses, consolidated companies, and investments	(1)				(11)
Restructuring and Asset Related Charges - Net	40		182		370
Amortization of inventory step-up	429				1,494
Goodwill Impairment Charge	0		4,503		4,503
Other net loss (gain)	(61)				306
Changes in operating assets and liabilities - net	(786)				(5,115)
Cash used for operating activities	(310)				(2,561)
Cash (used for) provided by investing activities
Capital expenditures	(92)				(911)
Proceeds from the sale of property, businesses, and consolidated companies, net of cash divested	1				54
Payments to Acquire Businesses, Net of Cash Acquired	3				0
Investments in and loans to nonconsolidated affiliates	0				0
Purchases of investments	(26)				(1,235)
Proceeds from Sale and Maturities of Investments	1,049				1,930
Other investing activities - net	0				(4)
Cash (used for) provided by investing activities	935				(166)
Cash (used for) provided by financing activities
Change in short-term (less than 90 days) borrowings	588				2,381
Proceeds from Issuance of Long-term Debt	0				756
Payments of Long-term Debt	(41)				(1,534)
Proceeds from Stock Options Exercised	11				81
Payments of Dividends to Stockholders	(326)				(7)
Distributions to DowDuPont	0				(2,481)
Other financing activities	(2)				(48)
Cash (used for) provided by financing activities	230				(852)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(69)				(187)
Change in cash classified as held for sale	(37)				0
(Decrease) increase in cash, cash equivalents and restricted cash	749				(3,766)
Cash, Cash Equivalents, and Restricted Cash, beginning of period	4,005				7,808	4,005
Cash, Cash Equivalents, and Restricted Cash, end of period	4,754	$ 4,005	$ 4,042	$ 4,005	$ 4,042	4,042
Predecessor [Member]
Cash used for operating activities
Net (loss) income		(229)		1,761
Depreciation and Amortization				749
Net Periodic Pension (Benefit) Cost				295
Pension Contributions				(3,024)
Net gain on sales of property, businesses, consolidated companies, and investments				(204)
Restructuring and Asset Related Charges - Net		11		323
Asset related charges				279
Goodwill Impairment Charge		0		0
Other net loss (gain)				481
Changes in operating assets and liabilities - net				(4,286)
Cash used for operating activities				(3,949)
Cash (used for) provided by investing activities
Capital expenditures				(687)
Proceeds from the sale of property, businesses, and consolidated companies, net of cash divested				300
Payments to Acquire Businesses, Net of Cash Acquired				(246)
Investments in and loans to nonconsolidated affiliates				(22)
Purchases of investments				(5,457)
Proceeds from Sale and Maturities of Investments				3,977
Foreign currency exchange contract settlements				(206)
Other investing activities - net				(41)
Cash (used for) provided by investing activities				(2,382)
Cash (used for) provided by financing activities
Change in short-term (less than 90 days) borrowings				3,610
Proceeds from Issuance of Long-term Debt				2,734
Payments of Long-term Debt				(229)
Proceeds from Stock Options Exercised				235
Payments of Dividends to Stockholders				(666)
Other financing activities				(52)
Cash (used for) provided by financing activities				5,632
Effect of exchange rate changes on cash, cash equivalents and restricted cash				187
Change in cash classified as held for sale				(31)
(Decrease) increase in cash, cash equivalents and restricted cash				(543)
Cash, Cash Equivalents, and Restricted Cash, beginning of period	$ 4,005			4,548		$ 4,005
Cash, Cash Equivalents, and Restricted Cash, end of period		$ 4,005		$ 4,005