Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Other intangible assets (accumulated amortization)	$ 3,657	$ 3,379
Common stock, authorized (in shares)	5,000,000,000	100
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares, Issued	749,025,762	100
Treasury stock (in shares)	5,813,756	0
Cash and cash equivalents | Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents (variable interest entities restricted)		$ 71
Property, Plant and Equipment [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity, Consolidated, Assets, Noncurrent, Pledged	$ 657	683
Long-term debt | Variable Interest Entity, Primary Beneficiary [Member]
Variable interest entities nonrecourse		75
The Dow Chemical Company [Domain]
Trade (allowance for doubtful receivables)	40	42
Other investments (investments carried at fair value	1,688	1,699
Other intangible assets (accumulated amortization)	$ 3,657	$ 3,379
Common stock, authorized (in shares)	100	100
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares, Issued	100	100
Treasury stock (in shares)	0	0
The Dow Chemical Company [Domain] | Cash and cash equivalents | Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents (variable interest entities restricted)	$ 26	$ 71
The Dow Chemical Company [Domain] | Property, Plant and Equipment [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity, Consolidated, Assets, Noncurrent, Pledged		683
The Dow Chemical Company [Domain] | Long-term debt | Variable Interest Entity, Primary Beneficiary [Member]
Variable interest entities nonrecourse	$ 45	$ 75