Dow 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 issued (in shares)	749,025,762	100
Treasury stock (in shares)	5,813,756	0
Variable Interest Entity, Primary Beneficiary [Member] | Cash and cash equivalents
Cash and cash equivalents (variable interest entities restricted)		$ 71
Variable Interest Entity, Primary Beneficiary [Member] | Property, Plant and Equipment [Member]
Net property (variable interest entities restricted	$ 657	683
Variable Interest Entity, Primary Beneficiary [Member] | Long-term debt
Variable interest entities nonrecourse		$ 75