Dow Consolidated Statements of Cash Flows Statement - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Cash Flows [Abstract]
Net income	$ 40	$ 1,038
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	0	445
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	40	593
Depreciation and amortization	2,148	2,225
Credit for deferred income tax	(198)	(146)
Earnings of nonconsolidated affiliates less than dividends received	515	927
Net periodic pension benefit cost	195	101
Pension contributions	(188)	(206)
Net gain on sales of assets, businesses and investments	(283)	(48)
Restructuring and asset related charges - net	719	368
Other net loss	288	143
Accounts and notes receivable	339	994
Inventories	587	483
Accounts payable	(560)	(926)
Other assets and liabilities, net	994	(715)
Cash provided by operating activities - continuing operations	4,596	3,793
Cash provided by operating activities - discontinued operations	0	187
Cash provided by operating activities	4,596	3,980
Capital expenditures	(955)	(1,384)
Investment in gas field developments	(5)	(71)
Payments to Acquire Equipment on Lease	(4)	(9)
Proceeds from sales of property and businesses, net of cash divested	295	47
Payments to Acquire Businesses, Net of Cash Acquired	(130)	0
Investments in and loans to nonconsolidated affiliates	(280)	(333)
Distributions and loan repayments from nonconsolidated affiliates	7	0
Purchases of investments	(582)	(784)
Proceeds from sales and maturities of investments	1,009	973
Payments for (Proceeds from) Other Investing Activities	29	0
Cash used for investing activities - continuing operations	(616)	(1,561)
Cash used for investing activities - discontinued operations	0	(34)
Cash used for investing activities	(616)	(1,595)
Changes in short-term notes payable	(267)	149
Proceeds from Short-term Debt, Maturing in More than Three Months	163	0
Repayments of Short-term Debt, Maturing in More than Three Months	(163)	0
Proceeds from issuance of long-term debt	4,649	2,146
Payments on long-term debt	(4,347)	(4,271)
Purchases of treasury stock	(125)	(406)
Proceeds from issuance of stock	53	39
Transaction financing, debt issuance and other costs	(175)	(61)
Employee taxes paid for share-based payment arrangements	(26)	(54)
Distributions to noncontrolling interests	(19)	(16)
Payments to Noncontrolling Interests	0	(131)
Dividends paid to stockholders	(1,552)	(1,033)
Dividends paid to DowDuPont Inc.	0	(535)
Settlements and transfers related to separation from DowDuPont Inc.	0	1,935
Cash used for financing activities - continuing operations	(1,809)	(2,238)
Cash used for financing activities - discontinued operations	0	(18)
Cash used for financing activities	(1,809)	(2,256)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	4	(54)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	2,175	75
Cash, cash equivalents and restricted cash at beginning of period	2,380	2,764
Cash, cash equivalents and restricted cash at end of period	4,555	2,839
Less: Restricted cash and cash equivalents, included in "Other current assets"	6	16
Cash and cash equivalents at end of period	$ 4,549	$ 2,823