Dow Consolidated Statements of Cash Flows Statement - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Statement of Cash Flows [Abstract]
Net income	$ 2,938	$ 41
Depreciation and amortization	1,462	1,424
Provision (credit) for deferred income tax	388	(59)
Earnings of nonconsolidated affiliates less than (in excess of) dividends received	(283)	455
Net periodic pension benefit cost	29	129
Pension contributions	(1,109)	(112)
Net gain on sales of assets, businesses and investments	(50)	(39)
Restructuring and asset related charges - net	22	102
Other net loss	224	163
Accounts and notes receivable	(1,903)	696
Inventories	(1,278)	429
Accounts payable	1,357	(896)
Other assets and liabilities, net	(4)	502
Cash provided by operating activities - continuing operations	1,793	2,835
Cash used for operating activities - discontinued operations	(80)	(6)
Cash provided by operating activities	1,713	2,829
Capital expenditures	(622)	(668)
Investment in gas field developments	(24)	(5)
Payments to Acquire Equipment on Lease	(3)	(2)
Proceeds from sales of property and businesses, net of cash divested	10	14
Payments to Acquire Businesses, Net of Cash Acquired	(107)	0
Investments in and loans to nonconsolidated affiliates	0	(236)
Distributions and loan repayments from nonconsolidated affiliates	11	6
Purchases of investments	(560)	(462)
Proceeds from sales and maturities of investments	527	790
Payments for (Proceeds from) Other Investing Activities	0	29
Cash used for investing activities	(768)	(534)
Changes in short-term notes payable	(38)	181
Proceeds from Short-term Debt, Maturing in More than Three Months	72	163
Repayments of Short-term Debt, Maturing in More than Three Months	0	(100)
Proceeds from issuance of long-term debt	68	2,509
Payments on long-term debt	(1,425)	(2,359)
Purchases of treasury stock	(200)	(125)
Proceeds from issuance of stock	200	30
Transaction financing, debt issuance and other costs	(95)	(99)
Employee taxes paid for share-based payment arrangements	(11)	(26)
Distributions to noncontrolling interests	(28)	(19)
Dividends paid to stockholders	(1,043)	(1,034)
Cash used for financing activities	(2,500)	(879)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(12)	(66)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(1,567)	1,350
Cash, cash equivalents and restricted cash at beginning of period	5,108	2,380
Cash, cash equivalents and restricted cash at end of period	3,541	3,730
Less: Restricted cash and cash equivalents, included in "Other current assets"	50	6
Cash and cash equivalents at end of period	$ 3,491	$ 3,724