Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended								4 Months Ended	8 Months Ended	12 Months Ended		28 Months Ended
	Dec. 31, 2019		Mar. 31, 2019		Dec. 31, 2018		Mar. 31, 2018		Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Net (loss) income									$ 1,192	$ 1,761	$ (941)	$ (5,027)
Depreciation and Amortization											1,599	2,790
(Benefit from) Provision for Deferred Income Tax									(2,770)		(477)	31
Net Periodic Pension (Benefit) Cost									(113)	295	(264)	(321)
Pension Contributions									(68)	(3,024)	(121)	(1,314)
Net gain on sales of property, businesses, consolidated companies, and investments									(691)	(204)	(142)	(11)
Goodwill Impairment Charge					$ 0		$ 0		0	0	0	4,503
Loss on Extinguishment of Debt					81				0	0	13	81
Restructuring and Asset Related Charges - Net	$ 55	[1]	$ 61	[1]	228	[1]	130	[1]	270	12	222	694
Asset related charges										279
Amortization of inventory step-up									1,573		272	1,628
Other net loss									106	481	246	262
Accounts and Notes Receivable									1,576	(2,269)	(361)	(1,522)
Inventories									(903)		74	(498)
Inventories and Other Operating Assets										(202)
Accounts Payable									1,106		149	642
Accounts Payable and Other Operating Liabilities										(1,555)
Other Assets and Liabilities, Net									1,402		(418)	(1,564)
Accrued Interest and Income Taxes										(260)
Cash provided by (used for) operating activities									3,674	(3,949)	1,070	483
Capital expenditures									(499)	(687)	(1,163)	(1,501)
Proceeds from the sale of property, businesses, and consolidated companies, net of cash divested									2,351	300	249	69
Acquisitions of businesses - Net of Cash Acquired									3	(246)	(10)	0
Investments in and loans to nonconsolidated affiliates									(5)	(22)	(10)	(8)
Proceeds from sale of ownership interest in non-consolidated affiliates									0	0	21	9
Purchases of investments									(1,043)	(5,457)	(138)	(1,257)
Proceeds from Sale and Maturities of Investments									2,938	3,977	160	2,186
Foreign currency exchange contract settlements										(206)
Other investing activities - net									(67)	(41)	(13)	(3)
Cash (used for) provided by investing activities									3,678	(2,382)	(904)	(505)
Change in short-term (less than 90 days) borrowings									(2,541)	3,610	(1,868)	400
Proceeds from Issuance of Long-term Debt									499	2,734	1,001	756
Repayments of Long-term Debt									(43)	(229)	(6,804)	(5,956)
Payments for Repurchase of Common Stock									0	0	(25)	0
Proceeds from Stock Options Exercised									30	235	47	85
Payments of Dividends									(329)	(659)	(194)	0
Distributions to Dow and DowDuPont									(1,200)		(317)	(2,806)
Contributions from Dow and DowDuPont									0		7,396	5,363
Cash Transferred to DowDuPont at Internal Reorganizations									0		(2,053)	0
Debt Extinguishment Costs									0	0	(79)	(378)
Other financing activities									(23)	(59)	(33)	(88)
Cash (used for) provided by financing activities									(3,607)	5,632	(2,929)	(2,624)
Effect of exchange rate changes on cash, cash equivalents and restricted cash									(22)	187	(88)	(244)
Change in cash classified as held for sale									88	(31)	0	0
(Decrease) increase on cash, cash equivalents and restricted cash									3,811	(543)	(2,851)	(2,890)
Cash, cash equivalents and restricted cash at beginning of period			5,024				7,914		4,005	4,548	5,024	7,914	$ 4,005
Cash, cash equivalents and restricted cash at end of period	2,173				5,024				7,914	4,005	2,173	5,024	2,173
Interest, net of amounts capitalized									83	331	263	923
Income Taxes									(215)	272	234	961
EID [Member]
Net (loss) income									1,192	1,761	(1,022)	(5,027)
Depreciation and Amortization											1,000	909
(Benefit from) Provision for Deferred Income Tax									(2,770)		(477)	31
Net Periodic Pension (Benefit) Cost									(113)	295	(264)	(321)
Pension Contributions									(68)	(3,024)	(121)	(1,314)
Net gain on sales of property, businesses, consolidated companies, and investments									(691)	(204)	(142)	(11)
Goodwill Impairment Charge									0	0	0	4,503
Loss on Extinguishment of Debt									0	0	13	81
Restructuring and Asset Related Charges - Net									270	12	222	694
Asset related charges										279
Amortization of inventory step-up									1,573		272	1,628
Other net loss									106	481	246	262
Accounts and Notes Receivable									1,576	(2,269)	(361)	(1,522)
Inventories									(903)		74	(498)
Inventories and Other Operating Assets										(202)
Accounts Payable									1,106		149	642
Accounts Payable and Other Operating Liabilities										(1,555)
Other Assets and Liabilities, Net									1,402		(411)	(1,564)
Accrued Interest and Income Taxes										(260)
Cash provided by (used for) operating activities									3,674	(3,949)	996	483
Capital expenditures									(499)	(687)	(1,163)	(1,501)
Proceeds from the sale of property, businesses, and consolidated companies, net of cash divested									2,351	300	249	69
Acquisitions of businesses - Net of Cash Acquired									3	(246)	(10)	0
Investments in and loans to nonconsolidated affiliates									(5)	(22)	(10)	(8)
Proceeds from sale of ownership interest in non-consolidated affiliates									0	0	21	9
Purchases of investments									(1,043)	(5,457)	(138)	(1,257)
Proceeds from Sale and Maturities of Investments									2,938	3,977	160	2,186
Foreign currency exchange contract settlements										(206)
Other investing activities - net									(67)	(41)	(13)	(3)
Cash (used for) provided by investing activities									3,678	(2,382)	(904)	(505)
Change in short-term (less than 90 days) borrowings									(2,541)	3,610	(1,868)	400
Proceeds from Related Party Debt									0	0	4,240	0
Repayments of Related Party Debt									0	0	(219)	0
Proceeds from Issuance of Long-term Debt									499	2,734	1,001	756
Repayments of Long-term Debt									(43)	(229)	(6,804)	(5,956)
Proceeds from Stock Options Exercised									30	235	47	85
Payments of Dividends									(332)	(666)	(10)	(10)
Distributions to Dow and DowDuPont									(1,200)		(317)	(2,806)
Contributions from Dow and DowDuPont									0		3,255	5,363
Cash Transferred to DowDuPont at Internal Reorganizations									0		(2,053)	0
Debt Extinguishment Costs									0	0	(79)	(378)
Other financing activities									(20)	(52)	(48)	(78)
Cash (used for) provided by financing activities									(3,607)	5,632	(2,855)	(2,624)
Effect of exchange rate changes on cash, cash equivalents and restricted cash									(22)	187	(88)	(244)
Change in cash classified as held for sale									88	(31)	0	0
(Decrease) increase on cash, cash equivalents and restricted cash									3,811	(543)	(2,851)	(2,890)
Cash, cash equivalents and restricted cash at beginning of period			$ 5,024				$ 7,914		4,005	4,548	5,024	7,914	4,005
Cash, cash equivalents and restricted cash at end of period	$ 2,173				$ 5,024				7,914	4,005	2,173	5,024	2,173
Interest, net of amounts capitalized									83	331	263	923
Income Taxes									(215)	272	234	961
Total company [Member]
Depreciation and Amortization									886	749	1,599	2,790
Goodwill Impairment Charge									0	0	1,102	4,503
Restructuring and Asset Related Charges - Net									378		339	803
Total company [Member] | EID [Member]
Depreciation and Amortization									886	749	1,599	2,790
Goodwill Impairment Charge											1,102	4,503
Restructuring and Asset Related Charges - Net									378		$ 339	$ 803
Successor Period [Member]
Cash, cash equivalents and restricted cash at beginning of period									4,103				4,103
Cash, cash equivalents and restricted cash at end of period										4,103
Successor Period [Member] | EID [Member]
Cash, cash equivalents and restricted cash at beginning of period									$ 4,103				$ 4,103
Cash, cash equivalents and restricted cash at end of period										$ 4,103

[1] Note 7 - Restructuring and Asset Related Charges - Net, Note 5 - Divestitures and Other Transactions, and Note 15 - Goodwill and Other Intangible Assets, for additional information related to integration and separation costs, restructuring and asset related charges - net, discontinued operations, and goodwill impairment charge, respectively.